|  | C |
SECTION C — CHEMISTRY AND METALLURGY

CHEMISTRY

|  | C07 |
ORGANIC CHEMISTRY (such compounds as the oxides, sulphides, and oxysulphides of carbon, cyanogen, phosgene, hydrocyanic acid and salts thereof Fulltext... Hierarchy... Expanded...C01; macromolecular compounds Fulltext... Hierarchy... Expanded...C08; dyes Fulltext... Hierarchy... Expanded...C09; fermentation products Fulltext... Hierarchy... Expanded...C12; production of organic compounds by electrolysis or electrophoresis Fulltext... Hierarchy... Expanded...C25B 3/00)

|  | C07 |
Note(s) Salts of a compound, unless specifically provided for, are classified as that compound, e.g. aniline hydrochloride is classified as containing carbon, hydrogen and nitrogen only (in Fulltext... Hierarchy... Expanded...C07C 87/52), sodium oxalate is classified as oxalic acid (in Fulltext... Hierarchy... Expanded...C07C 55/06), and a mercaptide is classified as the mercaptan. Metal chelates are dealt with in the same way. Similarly, metal alcoholates and metal phenates are classified in Fulltext... Hierarchy... Expanded...C07C and not in sub-class Fulltext... Hierarchy... Expanded...C07F— the alcoholates in Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C07C 31/28-C07C 31/32 and the phenates as the corresponding phenols in Fulltext... Hierarchy... Expanded...C07C 39/00. Salts formed between two or more organic compounds are classified as the compound providing the essential ion with secondary classification as the compound providing the other ion. In the absence of an indication to the contrary, and with the exception referred to below, a compound is always classified in the last appropriate place in the classification system, e.g. a compound containing an acyclic chain and a heterocyclic ring is classified only as a heterocyclic compound, and a sterol is classified only as a cyclopentanophenanthrene compound. In general, and in the absence of an indication to the contrary (such as groups Fulltext... Hierarchy... Expanded...C07C 59/25, Fulltext... Hierarchy... Expanded...C07C 59/26), the terms "acyclic" and "aliphatic" are used to describe compounds in which there is no ring; and, if a ring were present, the compound would be taken by the "last place" rule to a later group for cycloaliphatic or aromatic compounds, if such a group exists. Where a compound or an entire group of compounds exists in tautomeric forms, it is classified as though existing in the form which is classified last in the system, unless the other form is specifically mentioned earlier in the system. Albumens, proteins, alkaloids of unknown structure, glucosides of unknown structure are examples of compounds to be found unter Fulltext... Hierarchy... Expanded...C07G. Inventions dealing with chemical compounds and their preparation are classified in the groups for the type of compound prepared. The processes of preparation should be secondarily classified in the groups for the types of reaction employed when such groups exist. General processes for the preparation of a class of compounds falling into more than one main group are classified in the groups for the processes employed when such groups exist. The compounds prepared may be secondarily classified in the groups for the types of compounds prepared.

|  | C07J |
STEROIDS (Seco-steroids Fulltext... Hierarchy... Expanded...C07C) [2]

|  | C07J |
Note(s) This sub-class comprises compounds containing a cyclopenta (a) phenanthrene skeleton or a ring structure derived therefrom by contraction or expansion of one ring by one or two atoms, by contraction or expansion of two rings each by one atom, by contraction of one ring by one atom and expansion of one ring by one atom, by substitution of one or two carbon atoms of the cyclopenta (a) phenanthrene skeleton by hetero atoms, in combination with the above defined contraction or expansion or not, or by condensation with carbocyclic or heterocyclic rings in combination with one or more of the foregoing alterations or not. [2]

|  | C07J 1/00 - C07J 21/00 |
Normal steroids, i.e. cyclopenta (a) phenanthrenes, containing carbon, hydrogen, halogen, or oxygen

|  | C07J 1/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, not substituted in position 17 beta by a carbon atom, e.g. estrane, androstane [2]

|  | C07J 3/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, substituted in position 17 beta by one carbon atom [2]

|  | C07J 5/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane, and substituted in position 21 by only one singly bound oxygen atom [2]

|  | C07J 7/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, substituted in position 17 beta by a chain of two carbon atoms (Fulltext... Hierarchy... Expanded...C07J 5/00 takes precedence) [2]

|  | C07J 9/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane [2]

|  | C07J 11/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, not substituted in position 3 [2]

|  | C07J 13/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, having a double bond from or to position 17 [2]

|  | C07J 15/00 |
Stereochemically pure steroids containing carbon, hydrogen, halogen, or oxygen, having a partially or totally inverted skeleton, e.g. retrosteroids, L-isomers [2]

|  | C07J 17/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, having an oxygen-containing hetero ring not condensed with the cyclopenta (a) phenantrene skeleton (cardanolide, bufanolide Fulltext... Hierarchy... Expanded...C07J 19/00) [2]

|  | C07J 19/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, substituted in position 17 by a lactone ring [2]

|  | C07J 21/00 |
Normal steroids containing carbon, hydrogen, halogen, or oxygen, having an oxygen-containing hetero ring spiro-condensed with the cyclopenta (a) phenanthrene skeleton [2]

|  | C07J 31/00 - C07J 33/00 |
Normal steroids, i.e. cyclopenta (a) phenanthrenes, containing sulphur

|  | C07J 31/00 |
Normal steroids containing one or more sulphur atoms not belonging to a hetero ring [2]

|  | C07J 33/00 |
Normal steroids having a sulphur-containing hetero ring spiro-condensed or not condensed with the cyclopenta (a) phenanthrene skeleton [2]

|  | C07J 41/00 - C07J 43/00 |
Normal steroids, i.e. cyclopenta (a) phenanthrenes, containing nitrogen

|  | C07J 41/00 |
Normal steroids containing one or more nitrogen atoms not belonging to a hetero ring [2]

|  | C07J 43/00 |
Normal steroids having a nitrogen-containing hetero ring spiro-condensed or not condensed with the cyclopenta (a) phenanthrene skeleton [2]

|  | C07J 51/00 |
Normal steroids with unmodified cyclopenta (a) phenanthrene skeleton not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C07J 1/00-C07J 43/00 [2]

|  | C07J 53/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by spiro linkage with a carbocyclic ring system or by formation of an additional ring by means of a direct link between two ring carbon atoms [2]

|  | C07J 61/00 - C07J 69/00 |
Nor- or homosteroids

|  | C07J 61/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by contraction of only one ring by one or two atoms [2]

|  | C07J 63/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by expansion of only one ring by one or two atoms [2]

|  | C07J 65/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by contraction of two rings, each by one atom [2]

|  | C07J 67/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by expansion of two rings, each by one atom [2]

|  | C07J 69/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by contraction of only one ring by one atom and expansion of only one ring by one atom [2]

|  | C07J 71/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton is condensed with a heterocyclic ring (spiro condensed heterocyclic rings Fulltext... Hierarchy... Expanded...C07J 21/00, Fulltext... Hierarchy... Expanded...C07J 33/00, Fulltext... Hierarchy... Expanded...C07J 43/00) [2]

|  | C07J 73/00 |
Steroids in which the cyclopenta (a) phenanthrene skeleton has been modified by substitution of one or two carbon atoms by hetero atoms [2]