US PATENT SUBCLASS 548 / 121
.~.~.~.~ Bicyclo ring system having the five-membered hetero ring as one of the cyclos

Current as of: June, 1999
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548 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
120  DF  .~.~.~ The five-membered hetero ring contains ring selenium and is one of the cyclos in a polycyclo ring system {1}
121.~.~.~.~ Bicyclo ring system having the five-membered hetero ring as one of the cyclos

DEFINITION

Classification: 548/121

(under subclass 120) Compounds in which the polycyclo ring system consists of exactly two rings, one of which is the five-membered hetero ring containing nitrogen and selenium as hetero atoms.

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