US PATENT SUBCLASS 552 / 603
.~.~.~.~ Carbon or halogen bonded directly at the 1-, 2-, 3-, 4- or 5-position

Current as of: June, 1999
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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}
603.~.~.~.~ Carbon or halogen bonded directly at the 1-, 2-, 3-, 4- or 5-position

DEFINITION

Classification: 552/603

(under subclass 599) Compounds wherein carbon or halogen is bonded directly at the 1-,2-,3-,4-, or 5-position of the cyclopentanohydrophenanthrene ring system.