US PATENT SUBCLASS 552 / 619
.~.~.~ Oxygen bonded directly at the 3-, 11- and 17-positions (e.g., 1-androstene 3,11,17-triones, 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.~.~.~ Oxygen bonded directly at the 3-, 11- and 17-positions (e.g., 1-androstene 3,11,17-triones, etc.) {2}
620  DF  .~.~.~.~> Carbon or halogen bonded directly at the 1, 2- or 4-position
621  DF  .~.~.~.~> Unsaturation between the 4- and 5-positions (e.g., adrenosterones, 11 hydroxytestosterones, etc.) {1}

DEFINITION

Classification: 552/619

(under subclass 612) Compounds wherein oxygen is bonded directly at the 3-, 11- and 17-positions of the cyclopentanohydrophenanthrene ring system.

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