US PATENT SUBCLASS 552 / 621
.~.~.~.~ Unsaturation between the 4- and 5-positions (e.g., adrenosterones, 11 hydroxytestosterones, 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}
612  DF  .~.~ Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {6}
619  DF  .~.~.~ Oxygen bonded directly at the 3-, 11- and 17-positions (e.g., 1-androstene 3,11,17-triones, etc.) {2}
621.~.~.~.~ Unsaturation between the 4- and 5-positions (e.g., adrenosterones, 11 hydroxytestosterones, etc.) {1}
622  DF  .~.~.~.~.~> 17 alpha-position substituted (e.g., 11-keto-17 alpha-alkyltestosterones, etc.)

DEFINITION

Classification: 552/621

(under subclass 619) Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.

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