US PATENT SUBCLASS 552 / 632
.~.~.~ 19-position substituted (e.g., 19-methylene-androstanes, 10-cyanoestranes, etc.)

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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}
623  DF  .~.~ Two oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {5}
632.~.~.~ 19-position substituted (e.g., 19-methylene-androstanes, 10-cyanoestranes, etc.)

DEFINITION

Classification: 552/632

(under subclass 623) Compounds in which a substituent is bonded directly at the 19-position of the cyclopentanohydrophenanthrene ring system.

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

(2) Note. The 19-position is present in the cyclopentanohydrophenanthrene ring system when a carbon is bonded directly at the 10-position of the cyclopentanohydrophenanthrene ring system, said carbon being designated the 19-position.