US PATENT SUBCLASS 552 / 582
.~.~.~ Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system


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  DF  .~.~ 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}
582.~.~.~ Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {5}
583  DF  .~.~.~.~> Oxygen bonded directly at the 5-, 6- or 7-position
584  DF  .~.~.~.~> Oxygen bonded directly at the 12-position
585  DF  .~.~.~.~> Oxygen bonded directly at the 15- or 16-position
586  DF  .~.~.~.~> Oxygen bonded directly at the 3- and 11-position {4}
592  DF  .~.~.~.~> Oxygen bonded directly at the 3- and 17-positions {4}


DEFINITION

Classification: 552/582

(under subclass 557) Compounds wherein two oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.

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