US PATENT SUBCLASS 552 / 572
.~.~.~.~.~.~ Carbon or halogen bonded directly at the 6- or 7-position


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}
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}
559  DF  .~.~.~ Three or more oxygens bonded directly to the cyclopentanohydrophenanthrene ring system {7}
569  DF  .~.~.~.~ Oxygen bonded directly at the 3-, 11-, and 17-positions {3}
570  DF  .~.~.~.~.~ Oxygen bonded directly at the 21-position {7}
572.~.~.~.~.~.~ Carbon or halogen bonded directly at the 6- or 7-position {1}
573  DF  .~.~.~.~.~.~.~> Carbon bonded directly at the 16-position


DEFINITION

Classification: 552/572

(under subclass 570) Compounds wherein carbon or halogen is bonded directly at the 6- or 7-position of the cyclopentanohydrophenanthrene ring system.

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