US PATENT SUBCLASS 548 / 151
.~.~.~.~.~.~ At least three ring hetero atoms in the tricyclo ring system

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}
146  DF  .~.~.~ 1,3-thiazoles (including hydrogenated) {7}
148  DF  .~.~.~.~ Polycyclo ring system having the thiazole ring as one of the cyclos {3}
150  DF  .~.~.~.~.~ Tricyclo ring system having the thiazole ring as one of the cyclos {1}
151.~.~.~.~.~.~ At least three ring hetero atoms in the tricyclo ring system

DEFINITION

Classification: 548/151

(under subclass 150) Compounds wherein the tricyclo ring system contains at least one ring hetero atom in addition to the ring sulfur and ring nitrogen of the thiazole ring.

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