US PATENT SUBCLASS 552 / 612
.~.~ Three or more 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}
612.~.~ Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {6}
613  DF  .~.~.~> Oxygen bonded directly at the 1-position
614  DF  .~.~.~> Oxygen bonded directly at the 2- or 4-position
615  DF  .~.~.~> Oxygen bonded directly at the 5-, 6- or 7-position
616  DF  .~.~.~> Oxygen bonded directly at the 16-position {1}
618  DF  .~.~.~> The A ring is a benzene ring
619  DF  .~.~.~> Oxygen bonded directly at the 3-, 11- and 17-positions (e.g., 1-androstene 3,11,17-triones, etc.) {2}

DEFINITION

Classification: 552/612

(under subclass 502) Compounds wherein three or more oxygens are bonded directly to the cyclopentanohydrophenanthrene ring system.

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