US PATENT SUBCLASS 536 / 26.12
.~.~.~.~.~.~ The N-hetero ring is part of a purine ring system

Current as of: June, 1999
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536 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
18.7  DF  .~.~ Nitrogen containing {13}
22.1  DF  .~.~.~ N-glycosides, polymers thereof, metal derivatives (e.g., nucleic acids, oligonucleotides, etc.) {12}
26.1  DF  .~.~.~.~ Phosphorus containing N-glycoside wherein the N is part of an N-hetero ring {9}
26.11  DF  .~.~.~.~.~ The phosphorus is part of a ring {2}
26.12.~.~.~.~.~.~ The N-hetero ring is part of a purine ring system {1}
26.13  DF  .~.~.~.~.~.~.~> Adenine or substituted adenine

DEFINITION

Classification: 536/26.12

The N-hetero ring is part of a purine ring system:

(under subclass 26.11) Compounds in which the nitrogen containing hetero ring is part of a purine ring system.

(1) Note. An example of a compound provided for herein is: [figure]