US PATENT SUBCLASS 552 / 633
.~.~.~ Carbon bonded directly at the 10- and 13-positions (e.g., androstenes, 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}
633.~.~.~ Carbon bonded directly at the 10- and 13-positions (e.g., androstenes, etc.) {5}
634  DF  .~.~.~.~> Carbon or halogen bonded directly at the 1- or 3-position
635  DF  .~.~.~.~> Carbon or halogen bonded directly at the 2- or 4-position
636  DF  .~.~.~.~> Unsaturation between the 5- and 6-positions (e.g., dehydroandrosterones, etc.) {1}
638  DF  .~.~.~.~> Unsaturation between the 4- and 5-positions (e.g., testosterones, etc.) {2}
641  DF  .~.~.~.~> The cyclopentanohydrophenanthrene ring system is fully saturated (e.g., androstandiols, androsterones, dihydrotestosterones, etc.)


DEFINITION

Classification: 552/633

(under subclass 623) Compounds wherein carbon is bonded directly at the 10- and 13-positions of the cyclopentanohydrophenanthrene ring system.

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