US PATENT SUBCLASS 544 / 327
.~.~.~.~.~.~.~ Sulfur attached indirectly to the diazine ring by nonionic bonding (e.g., thiamines, etc.)

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544 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224  DF  .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
242  DF  .~.~.~.~ 1,3-diazines {10}
322  DF  .~.~.~.~.~ Nitrogen attached directly to diazine ring by nonionic bonding {3}
326  DF  .~.~.~.~.~.~ At 4- or 6-position {3}
327.~.~.~.~.~.~.~ Sulfur attached indirectly to the diazine ring by nonionic bonding (e.g., thiamines, etc.)

DEFINITION

Classification: 544/327

Sulfur attached indirectly to the diazine ring by nonionic bonding (e.g., thiamines, etc.):

(under subclass 326) Compounds wherein sulfur is attached indirectly to the diazine ring by nonionic bonding.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

243, for thiamine derivatives having phosphorus substituents.

296, for thiamine derivatives having two or more pyrimidine rings.