US PATENT SUBCLASS 540 / 67
.~.~.~.~.~.~.~ Sulfur or nitrogen attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by acyclic nonionic bonding

Current as of: June, 1999
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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}
47  DF  .~.~.~ The cyclopentanohydrophenanthrene ring system is part of a polycyclo ring system having at least five cyclos {1}
48  DF  .~.~.~.~ Hetero ring is one of the cyclos of the polycyclo ring system {8}
61  DF  .~.~.~.~.~ The hetero ring contains plural oxygens {2}
63  DF  .~.~.~.~.~.~ The hetero ring is ortho-fused to the D ring {7}
67.~.~.~.~.~.~.~ Sulfur or nitrogen attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by acyclic nonionic bonding

DEFINITION

Classification: 540/67

(under subclass 63) Compounds in which sulfur or nitrogen is attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by acyclic nonionic bonding.

(1) Note. Examples of compounds provided for herein are: [figure]