US PATENT SUBCLASS 546 / 166
.~.~.~.~.~.~.~ The six-membered hetero ring is unsubstituted or alkyl substituted only

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}
112  DF  .~.~.~.~ Bicyclo ring system having the six-membered hetero ring as one of the cyclos {7}
152  DF  .~.~.~.~.~ Quinolines (including hydrogenated) {14}
165  DF  .~.~.~.~.~.~ Single bond between 1,2-positions and single bond between 3,4-positions {1}
166.~.~.~.~.~.~.~ The six-membered hetero ring is unsubstituted or alkyl substituted only

DEFINITION

Classification: 546/166

The six-membered hetero ring is unsubstituted or alkyl substituted only:

(under subclass 165) Compounds in which the six-membered hetero ring is unsubstituted or substituted by alkyl groups only.

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