US PATENT SUBCLASS 540 / 109
.~.~.~.~ The hetero ring is in the 17-position substituent of the cyclopentanohydrophenanthrene ring system


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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  DF  .~.~ Cyclopentanohydrophenanthrene ring system containing {10}
107  DF  .~.~.~ Nitrogen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {3}
109.~.~.~.~ The hetero ring is in the 17-position substituent of the cyclopentanohydrophenanthrene ring system {3}
110  DF  .~.~.~.~.~> The hetero ring is bonded directly to a -C(=X)- group, wherein X is chalcogen
111  DF  .~.~.~.~.~> Having -C(=X)-, wherein X is chalcogen, bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system
112  DF  .~.~.~.~.~> Chalcogen or nitrogen in chain between the hetero ring and the cyclopentanohydrophenanthrene ring system


DEFINITION

Classification: 540/109

(under subclass 107) Compounds wherein the substituent at the 17-position of the cyclopentanohydrophenanthrene ring system contains the hetero ring.

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