US PATENT SUBCLASS 435 / 88
.~.~.~.~.~ Having a fused ring containing a six-membered ring having two N-atoms in the same ring (e.g., purine nucleosides, 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}
72  DF  .~ Preparing compound containing saccharide radical {13}
84  DF  .~.~ Preparing nitrogen-containing saccharide {1}
85  DF  .~.~.~ N-glycoside {3}
87  DF  .~.~.~.~ Nucleoside {1}
88.~.~.~.~.~ Having a fused ring containing a six-membered ring having two N-atoms in the same ring (e.g., purine nucleosides, etc.)

DEFINITION

Classification: 435/88

Having a fused ring containing a six-membered ring having two N-atoms in the same ring (e.g., purine nucleosides, etc.):

(under subclass 87) Processes wherein the nitrogen is part of a purine or substituted purine ring.

(1) Note. See subclass 17, Note (1) for a definition of substituted.