US PATENT SUBCLASS 540 / 119
.~.~.~.~.~ The chalcogen is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system

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}
114  DF  .~.~.~ Oxygen containing hetero ring attached indirectly to the cyclopentanohydrophenanthrene ring system by nonionic bonding {4}
118  DF  .~.~.~.~ The hetero ring is bonded directly to chalcogen which is bonded directly to the cyclopentanohydrophenanthrene ring system {1}
119.~.~.~.~.~ The chalcogen is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system

DEFINITION

Classification: 540/119

(under subclass 118) Compounds in which the chalcogen is bonded directly at the 17-position of the cyclopentanohydrophenanthrene ring system.

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

[figure]