US PATENT SUBCLASS 540 / 102
.~.~.~.~ The hetero ring contains -C(=X)-O-, wherein X is chalcogen, as part of the ring (e.g., lactones, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~.~ The hetero ring contains -C(=X)-O-, wherein X is chalcogen, as part of the ring (e.g., lactones, etc.) {3}
103  DF  .~.~.~.~.~> Additional chalcogen, cyano, or -C(=X)-, wherein X is chalcogen, bonded directly to the hetero ring
104  DF  .~.~.~.~.~> Nitrogen or sulfur attached directly or indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding
105  DF  .~.~.~.~.~> 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: 540/102

(under subclass 94) Compounds in which - - O -, wherein is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), is part of the hetero ring.

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