US PATENT SUBCLASS 552 / 607
.~.~.~.~ Unsaturation between the 4- and 5-positions (e.g., progesterones, 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}
557  DF  .~.~ Carbon bonded directly at the 17-beta-position of the cyclopentanohydrophenanthrene ring system is a member of an acyclic chain of two uninterrupted carbons (e.g., pregnanes, etc.) {4}
599  DF  .~.~.~ Exactly one oxygen bonded directly to the cyclopentanohydrophenanthrene ring system {7}
607.~.~.~.~ Unsaturation between the 4- and 5-positions (e.g., progesterones, etc.) {1}
608  DF  .~.~.~.~.~> Additional unsaturation in the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 552/607

(under subclass 599) Compounds which contain a double bond between the 4- and 5-positions of the cyclopentanohydrophenanthrene ring system.

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