IPC Definitions - January 01, 2012

C07J - Definition fr

Definition statement

This subclass covers:

Compounds containing cyclopenta[a]hydrophenanthrene skeleton or a ring structure derived therefrom:

Preparation of steroids including purification, separation, stabilisation or use of additives unless provided for elsewhere, as specified below.

Treatment and modification of steroids provided that

Relationship between large subject matter areas

In class C07, in the absence of an indication to the contrary, a compound is classified in the last appropriate place, i.e. in the last appropriate subclass. For example cyclopenta [a] hydrophenantrenes are classified in subclass C07J as steroids and not in subclasses C07C or C07D as carbocyclic or heterocyclic compounds.

Subclass C07J is a function-oriented entry for the compounds themselves and does not cover the application or use of the compounds under the subclass definition. For classifying such information other entries in the IPC exist, for example:

Multiple classification

When a steroid forms a salt, an adduct or a complex with another organic compound, classification is also made in the entry in class C07 for this organic compound.

Biocidal, pest repellant, pest attractant or plant growth regulatory activity of compounds or preparations is further classified in subclass A01P.

Therapeutic activity of compounds is further classified in subclass A61P.

Cosmetic activity of compounds is further classified in subclass A61Q.

References relevant to classification in this subclass

This subclass does not cover:

Seco-steroids

C07C

Fermentation or enzyme-using processes to synthesise steroids

C12P 33/00

Electrolytic production of organic compounds

C25B 3/00

Informative references

Attention is drawn to the following places, which may be of interest for search:

Macromolecular compounds

C08

Special rules of classification

In this subclass, in the absence of an indication to the contrary, a compound is classified in the last appropriate place.

Salts of steroids are classified in the groups for these steroids. Metal chelates containing steroids are dealt with in the same way.

Glossary of terms

In this subclass, the following terms or expressions are used with the meaning indicated:

A-, B-, C- or D-homosteroid

Compound in which a cyclopenta[a]hydrophenanthrene skeleton is modified by expansion of rings A, B, C or D correspondingly by one atom (the prefix "homo" may also mean that one methyl or methylene group is added in certain position, e.g. 18-homosteroids).

A-, B-, C- or D-bishomosteroid

Compound in which a cyclopenta[a]hydrophenanthrene skeleton is modified by expansion of rings A, B, C or D correspondingly by two atoms.

A-, B-, C- or D-norsteroid

Compound in which a cyclopenta[a]hydrophenanthrene skeleton is modified by contraction of rings A, B, C or D correspondingly by one atom (the prefix "nor" may also mean that one methyl group in certain position is substituted by hydrogen atom, e.g. 19-norsteroids, or one methylene group among non-ring members in certain position is absent).

A-, B-, C- or D-bisnorsteroid

compound in which a cyclopenta[a]hydrophenanthrene skeleton is modified by contraction of rings A, B, C or D correspondingly by two atoms.

"alpha"

relates to stereoisomers and designates atoms or groups of atoms that are arranged below the plane of a ring system (the bond between such atoms or groups of atoms and a ring system is represented by a dotted line) provided that a cyclopenta[a]hydrophenanthrene skeleton is drawn on the plane so that rings A, B, C and D are arranged from left to right.

"beta"

relates to stereoisomers and designates atoms or groups of atoms that are arranged above the plane of a ring system (the bond between such atoms or groups of atoms and a ring system is represented by a thick or uninterrupted line) provided that a cyclopenta[a]hydrophenanthrene skeleton is drawn on the plane so that rings A, B, C and D are arranged from left to right.

Bile acids

Steroids having a hydroxy-group and a five-carbon-atom side-chain terminating in a carboxyl group, e.g. cholic acid.

Normal steroid

Compound containing non-modified cyclopenta[a]hydrophenanthrene skeleton.

Seco-steroid

Compound which can be obtained from steroids by a break of one of the bonds in cyclopenta[a]hydrophenanthrene skeleton.

Sterols

Steroid alcohols; contain cyclopenta[a]hydrophenanthrene skeleton plus an 8 to 10-carbon atom side-chain and a hydroxy-group, e.g. cholesterol, ergosterol".

Substitution of steroids in certain position

means substitution of hydrogen atom bound to the carbon atom of the cyclopenta[a]hydrophenanthrene skeleton in that position.