US PATENT SUBCLASS 540 / 105
.~.~.~.~.~ Chalcogen bonded directly at the 14-position of the cyclopentanohydrophenanthrene ring system or double bond in the D ring (e.g., cardenolides, etc.)

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}
94  DF  .~.~.~ Hetero ring attached directly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {3}
102  DF  .~.~.~.~ The hetero ring contains -C(=X)-O-, wherein X is chalcogen, as part of the ring (e.g., lactones, etc.) {3}
105.~.~.~.~.~ Chalcogen bonded directly at the 14-position of the cyclopentanohydrophenanthrene ring system or double bond in the D ring (e.g., cardenolides, etc.)

DEFINITION

Classification: 540/105

(under subclass 102) Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly at the 14-position of the cyclopentanohydrophenanthrene ring system or the D ring of the cyclopentanohydrophenanthrene ring system contains a double bond.

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