US PATENT SUBCLASS 546 / 197
.~.~.~.~.~.~.~ Plural ring hetero atoms in the polycyclo ring system

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}
184  DF  .~.~.~ Piperidines {8}
192  DF  .~.~.~.~ Additional ring containing {9}
195  DF  .~.~.~.~.~ The additional ring is one of the cyclos in a polycyclo ring system {3}
196  DF  .~.~.~.~.~.~ Hetero ring in the polycyclo ring system {3}
197.~.~.~.~.~.~.~ Plural ring hetero atoms in the polycyclo ring system {1}
198  DF  .~.~.~.~.~.~.~>.~ Ring nitrogen in the polycyclo ring system {1}

DEFINITION

Classification: 546/197

Plural ring hetero atoms in the polycyclo ring system:

(under subclass 196) Compounds in which the polycyclo ring system contains at least two ring hetero atoms.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]