US PATENT SUBCLASS 548 / 237
.~.~.~.~ One double bond between the ring members of the oxazole ring


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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}
215  DF  .~.~.~ 1,3-oxazoles (including hydrogenated) {6}
237.~.~.~.~ One double bond between the ring members of the oxazole ring {2}
238  DF  .~.~.~.~.~> 2-position substituent contains nitrogen, other than as nitro or nitroso
239  DF  .~.~.~.~.~> 2-position is unsubstituted or hydrocarbyl substituted only


DEFINITION

Classification: 548/237

(under subclass 215) Compounds in which there is only one double bond between ring members of the oxazole ring.

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