US PATENT SUBCLASS 540 / 2
.~.~ Cyclopentanohydrophenanthrene ring system containing

Current as of: June, 1999
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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
2.~.~ Cyclopentanohydrophenanthrene ring system containing {10}
3  DF  .~.~.~> Heavy metal or aluminum containing
4  DF  .~.~.~> Boron or silicon containing
5  DF  .~.~.~> Phosphorus attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding
6  DF  .~.~.~> Spiro {3}
47  DF  .~.~.~> The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos {1}
94  DF  .~.~.~> Hetero ring attached directly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {3}
106  DF  .~.~.~> Nitrogen attached directly to the cyclopentanohydrophenanthrene ring system by nonionic bonding
107  DF  .~.~.~> Nitrogen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {3}
114  DF  .~.~.~> Oxygen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {4}
120  DF  .~.~.~> Chalcogen attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding

DEFINITION

Classification: 540/2

(under subclass 1) Compounds which additionally contain the cyclopentanohydrophenanthrene ring system, which may contain double bonds between its ring members; i.e., [figure]

(1) Note. The phenanthrene portion of this tetracyclic ring system cannot be completely aromatic; it must be hydrogenated to some degree.

(2) Note. In the indents hereunder which refer to

positions, the numbers shown in the definition are employed.

(3) Note. Although the following structure types are properly classified elsewhere as pentacyclo ring systems and not here as cyclopentanohydrophenanthrenes, they have been crossed into appropriate cyclopentanohydrophenanthrene subclass(es) to make them available to the steroid examiners: [figure]

(4) Note. An example of a compound provided for herein is: [figure]

SEE OR SEARCH CLASS 514, Drug, Bio-Affecting and Body Treating Compositions,

172+, for a medical composition including a steroid compound with a hetero ring.

552, Organic Compounds,

502+, for nonheterocyclic cyclopentanohydrophenanthrene compounds.