US PATENT SUBCLASS 546 / 73
.~.~.~.~.~.~ The six-membered hetero ring shares ring members with one other cyclo only (e.g., pyrrocolines, etc.)

Current as of: June, 1999
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546 /   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 consisting of one nitrogen and five carbons {24}
26  DF  .~.~.~ Polycyclo ring system having the six-membered hetero ring as one of the cyclos {9}
61  DF  .~.~.~.~ Tetracyclo ring system having the six-membered hetero ring as one of the cyclos {5}
71  DF  .~.~.~.~.~ Ring nitrogen is shared by two of the cyclos {2}
73.~.~.~.~.~.~ The six-membered hetero ring shares ring members with one other cyclo only (e.g., pyrrocolines, etc.)

DEFINITION

Classification: 546/73

The six-membered hetero ring shares ring members with one other cyclo only (e.g., pyrrocolines, etc.):

(under subclass 71) Compounds wherein ring members of the six-membered hetero ring are ring members of one additional cyclo only in the tetracyclo ring system.

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