US PATENT SUBCLASS 552 / 648
.~.~.~.~.~ 17 alpha-position substituted (e.g., 17 alpha-ethynyl-19 nortestosterones, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
642  DF  .~.~.~ Carbon bonded directly at the 13-position (e.g., 19-norandrostenes, estradienes, etc.) {4}
646  DF  .~.~.~.~ Unsaturation between the 4- and 5-positions (e.g., 19-nortestosterones, 13 beta-alkyl-4-gonene-3,17-diones etc.) {2}
648.~.~.~.~.~ 17 alpha-position substituted (e.g., 17 alpha-ethynyl-19 nortestosterones, etc.)

DEFINITION

Classification: 552/648

(under subclass 646) Compounds in which a substituent is bonded directly at the 17 alpha-position of the cyclopentanohydrophenanthrene ring system.

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

[figure]