US PATENT SUBCLASS 552 / 540
.~.~ Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of six or more uninterrupted carbons (e.g., sterols, 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}
540.~.~ Carbon bonded directly at the 17 beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of six or more uninterrupted carbons (e.g., sterols, etc.) {4}
541  DF  .~.~.~> Oxygen bonded directly at the 1-, 2-, or 4-position
542  DF  .~.~.~> Oxygen bonded directly at the 6- or 7-position
543  DF  .~.~.~> Carbon or halogen bonded directly at the 6- or 7-position
544  DF  .~.~.~> Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system (e.g., cholesterols, cholestanols, stigmasterols, etc.) {3}

DEFINITION

Classification: 552/540

(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 six or more uninterrupted carbons.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

653, for Vitamin D compounds, calciferols, cholecalciferols, ergocalciferols, activated ergosterols, activated 7-dehydrocholesterols, irradiated ergosterol, irradiated 7-dehydrocholesterol, antirachitic vitamins, dihydrotachysterols and 3,5-cyclovitamin D compounds.

SEE OR SEARCH CLASS

514, Drug, Bio-Affecting and Body Treating Compositions, 169+, for a medicinal composition including a sterol compound.