US PATENT SUBCLASS 540 / 107
.~.~.~ Nitrogen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding

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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
2  DF  .~.~ Cyclopentanohydrophenanthrene ring system containing {10}
107.~.~.~ Nitrogen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {3}
108  DF  .~.~.~.~> The hetero ring is five-membered and has plural hetero atoms
109  DF  .~.~.~.~> The hetero ring is in the 17-position substituent of the cyclopentanohydrophenanthrene ring system {3}
113  DF  .~.~.~.~> Chalcogen in chain between the hetero ring and the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 540/107

(under subclass 2) Compounds in which a nitrogen containing hetero ring is attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding.

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