US PATENT SUBCLASS 552 / 535
.~.~ Halogen bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system

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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}
535.~.~ Halogen bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 552/535

(under subclass 502) Compounds wherein halogen is bonded directly at the 12-position of the cyclopentanohydrophenanthrene ring system.