US PATENT SUBCLASS 548 / 359.5
.~.~.~.~.~.~ 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}
356.1  DF  .~.~.~ 1,2-diazoles (including hydrogenated) {8}
358.1  DF  .~.~.~.~ Polycyclo ring system having the diazole ring as one of the cyclos {3}
359.1  DF  .~.~.~.~.~ Tricyclo ring system having the diazole ring as one of the cyclos {1}
359.5.~.~.~.~.~.~ At least three ring hetero atoms in the tricyclo ring system


DEFINITION

Classification: 548/359.5

(under subclass 359.1) Compounds wherein the tricyclo ring system contains at least one ring hetero atom in addition to the two ring nitrogens of the diazole ring.

(1) Note. This subclass contains, for example: [figure] [figure]