US PATENT SUBCLASS 552 / 500
.~ Cyclopentanohydrophenanthrene ring system wherein two nonadjacent carbons of the ring system are bonded directly to each other (e.g., 3,5 cyclocholesterols, 3,5-cycloandrostanes, etc.)

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}
500.~ Cyclopentanohydrophenanthrene ring system wherein two nonadjacent carbons of the ring system are bonded directly to each other (e.g., 3,5 cyclocholesterols, 3,5-cycloandrostanes, etc.) {1}
501  DF  .~.~> Oxygen bonded directly at the 6-position of the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 552/500

(under subclass 1) Compounds under Class 532, ..., containing a cyclopentano-hydrophenanthrene ring system configuration wherein two nonadjacent carbons of the ring system are bonded directly to each other and which may contain double bonds between ring members.

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