US PATENT SUBCLASS 552 / 557
.~.~ Carbon bonded directly at the 17-beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons (e.g., pregnanes, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {11}
502  DF  .~ Cyclopentanohydrophenanthrene ring system containing {21}
557.~.~ Carbon bonded directly at the 17-beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons (e.g., pregnanes, etc.) {4}
558  DF  .~.~.~> The A ring is a benzene ring
559  DF  .~.~.~> Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {7}
582  DF  .~.~.~> Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {5}
599  DF  .~.~.~> Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system {7}

DEFINITION

Classification: 552/557

(under subclass 502) Compounds wherein carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons.

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