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.
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]
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]