IPC/D 037/02
ANNEX 14
Title - C07J
Steroids
Definition statement
This subclass covers:
Compounds containing cyclopenta[a]hydrophenanthrene 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]hydrophenanthrene skeleton, which are not shared by rings, 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.
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


the treatment is not provided for elsewhere and
the resultant product is a compound under the subclass definition.
Relationship between large subject matter areas
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:
Preservation of bodies of humans or animals or plants of parts thereof; biocides, e.g. as
disinfectants, as pesticides, as herbicides; pest repellants or attractants; plant growth
regulators A01N.
Preparations for medical, dental, or toilet purposes A61K.
The following subclasses are used for multiple classification:
Biocidal, pest repellant, pest attractant or plant growth regulatory activity of compounds or
preparations is further classified in subclass A01P.
IPC/D 037/02
Annex 14, page 2
Therapeutic activity of compounds is further classified in subclass A61P.
Cosmetic activity of compounds is further classified in subclass A61Q.
When a steroid forms a salt, an adduct or a complex with another organic compound,
classification is also made in the entry in C07 for this organic compound.
Limiting references
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, classification is made 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
In this subclass, the following terms or expressions are used with the meaning indicated:
A,B,CorD–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,CorD-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,CorD-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).
IPC/D 037/02
Annex 14, page 3
A,B,CorD–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.
normal steroid
compound
containing
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.
non-modified
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.
Synonyms and Keywords
bile acids
steroids having a hydroxy-group and a five-carbon-atom side-chain
terminating in a carboxyl group, e.g. cholic acid.
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".