US PATENT SUBCLASS 435 / 126
.~.~.~ Containing five-membered hetero ring (e.g., griseofulvin, etc.)

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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

41  DF  MICRO-ORGANISM, TISSUE CELL CULTURE OR ENZYME USING PROCESS TO SYNTHESIZE A DESIRED CHEMICAL COMPOUND OR COMPOSITION {26}
117  DF  .~ Preparing heterocyclic carbon compound having only O, N, S, Se, or Te as ring hetero atoms {4}
123  DF  .~.~ Oxygen as only ring hetero atom {3}
126.~.~.~ Containing five-membered hetero ring (e.g., griseofulvin, etc.)

DEFINITION

Classification: 435/126

Containing five-membered hetero ring (e.g., griseofulvin, etc.):

(under subclass 123) Processes wherein the O-containing hetero ring has five members.