US PATENT SUBCLASS 549 / 418
.~.~.~.~.~.~ Hydroxy bonded directly at the 3-position and oxygen double bonded directly at the 4-position of the hetero ring (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)

Current as of: June, 1999
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549 /   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) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
356  DF  .~.~.~ The hetero ring is six-membered {9}
416  DF  .~.~.~.~ Chalcogen bonded directly to the hetero ring {6}
417  DF  .~.~.~.~.~ Plural chalcogens bonded directly to the hetero ring {1}
418.~.~.~.~.~.~ Hydroxy bonded directly at the 3-position and oxygen double bonded directly at the 4-position of the hetero ring (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)

DEFINITION

Classification: 549/418

(under subclass 417) Compounds in which hydroxy is bonded directly at the 3-position and oxygen is double bonded directly at the 4-position of the hetero ring, wherein the -H of the hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal.

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