US PATENT SUBCLASS 552 / 526
.~.~ Carbon double bonded directly to the cyclopentanohydrophenantrene ring system

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}
526.~.~ Carbon double bonded directly to the cyclopentanohydrophenantrene ring system {3}
527  DF  .~.~.~> The carbon is double bonded directly at the 2-position
528  DF  .~.~.~> The carbon is double bonded directly at the 16-position {1}
530  DF  .~.~.~> The carbon is double bonded directly at the 17-position (e.g., fusidic acids, etc.) {2}

DEFINITION

Classification: 552/526

(under subclass 502) Compounds in which carbon is double bonded directly to the cyclopentanohydrophenanthrene ring system.

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