US PATENT SUBCLASS 435 / 119
.~.~.~ Containing at least two hetero rings bridged or fused among themselves or bridged or fused with a common carbocyclic ring system, (e.g., rifamycin, etc.)

Current as of: June, 1999
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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}
118  DF  .~.~ Containing two or more hetero rings {1}
119.~.~.~ Containing at least two hetero rings bridged or fused among themselves or bridged or fused with a common carbocyclic ring system, (e.g., rifamycin, etc.)

DEFINITION

Classification: 435/119

Containing at least two hetero rings bridged or fused among themselves or bridged or fused with a common carbocyclic ring system (e.g., rifamycin, etc.):

(under subclass 118) Processes wherein the product synthesized contains at least two hetero rings which are bridged or fused among themselves or bridged or fused with a common carbocyclic ring system.

(1) Note. Ring systems containing two carbocyclic rings fused to a common heterocyclic ring where each of the carbocyclic rings share a hetero ring are included herein, e.g., [figure]

(2) Note. A common carbocyclic ring system may contain three or more carbon atoms and may be bridged or fused, e.g.,

[figure]

(3) Note. This subclass provides for compounds generally referred to as alkaloids.