US PATENT SUBCLASS 546 / 51
.~.~.~.~.~.~.~.~ Ring nitrogen is shared by five-membered cyclo and six-membered cyclo (e.g., vincamine, etc.)

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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}
42  DF  .~.~.~.~ Pentacyclo ring system having the six-membered hetero ring as one of the cyclos {3}
47  DF  .~.~.~.~.~ Plural ring hetero atoms in the pentacyclo ring system {2}
49  DF  .~.~.~.~.~.~ Two ring nitrogens in the pentacyclo ring system (e.g., quinacridones, etc.) {2}
50  DF  .~.~.~.~.~.~.~ Ring nitrogen is shared by two of the cyclos (e.g., yohimbanes, etc.) {2}
51.~.~.~.~.~.~.~.~ Ring nitrogen is shared by five-membered cyclo and six-membered cyclo (e.g., vincamine, etc.) {1}
52  DF  .~.~.~.~.~.~.~>.~.~ Additional ring nitrogen in the five-membered cyclo

DEFINITION

Classification: 546/51

Ring nitrogen is shared by five-membered cyclo and six-membered cyclo (e.g., vincamine, etc.):

(under subclass 50) Compounds wherein the ring nitrogen of the six membered hetero ring is additionally a member of a five-membered cyclo in the pentacyclo ring system.

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