US PATENT SUBCLASS 560 / 258
.~.~.~.~.~.~ Nor-A ring

Current as of: June, 1999
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560 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {17}
1  DF  .~ Carboxylic acid esters {14}
129  DF  .~.~ Acyclic acid moiety {9}
231  DD  .~.~.~ Unsubstituted acids of the acetic series {16}
256  DF  .~.~.~.~ Polycyclo-alicyclic ring system in alcohol moiety {1}
257  DF  .~.~.~.~.~ Nor- or homo- cyclopentanohydrophenanthrenes {1}
258.~.~.~.~.~.~ Nor-A ring

DEFINITION

Classification: 560/258

Nor-a ring:

(under subclass 257) Compounds wherein n=0 in the A ring.

(1) Note. This subclass contains, for example: [figure] [figure]