US PATENT SUBCLASS 514 / 404
.~.~.~.~ Divalent chalcogen or acyclic nitrogen double bonded directly to ring carbon of the diazole ring, or tautomeric equivalent

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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
183  DF  .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16}
359  DF  .~.~ Five-membered hetero ring containing at least one nitrogen ring atom (e.g., 1,2,3-triazoles, etc.) {11}
403  DF  .~.~.~ 1,2-diazoles {2}
404.~.~.~.~ Divalent chalcogen or acyclic nitrogen double bonded directly to ring carbon of the diazole ring, or tautomeric equivalent {1}
405  DF  .~.~.~.~.~> Polycyclo ring system having the diazole ring as one of the cyclos

DEFINITION

Classification: 514/404

Divalent chalcogen or acyclic nitrogen double bonded directly to ring carbon of the diazole ring, or tautomeric equivalent:

(under subclass 403) Subject matter wherein a ring carbon of the 1,2-diazole ring is bonded directly by a double bond to divalent chalcogen or acyclic nitrogen, or to a group which may tautomerize thereto (e.g., hydroxyl, sulfhydryl, acyclic amino, etc.).

(1) Note. (A) all 1,2-diazoles having the following structure, shown in the first illustration, are classified in this and indented subclasses; (B) the hydroxy pyrazole, for example, as shown in the second illustration below, is included in this subclass though its oxo tautomer, as shown in the third illustration below, may not be present in significant amounts; (C) Salts in which the labile hydrogen of, for example, an hydroxy, sulfhydryl or amino tautomer is replaced with a metal ion or amine salt are classified here. [figure] [caption]X is chalcogen or NR; A is N or CR'; B is the remaining ring members of the 1,2-diazole; R is H or a

substituent; R' is H or a substituent [figure] [figure]