US PATENT SUBCLASS 552 / 549
.~.~.~ Oxygen bonded directly at the 12-position (e.g., cholic acids, desoxycholic acids, dehydrocholic acids, 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}
548  DF  .~.~ Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of five uninterrupted carbons (e.g., choladienes, cholanic acids, etc.) stocks, yeast, molds, etc.) {3}
549.~.~.~ Oxygen bonded directly at the 12-position (e.g., cholic acids, desoxycholic acids, dehydrocholic acids, etc.) {1}
550  DF  .~.~.~.~> Halogen, nitrogen, or sulfur containing (e.g., glycocholic acids, taurocholic acids, etc.)

DEFINITION

Classification: 552/549

(under subclass 548) Compounds wherein oxygen is bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system.

(1) Note. Examples of compounds provided for herein are: [figure]