US PATENT SUBCLASS 546 / 34
.~.~.~.~.~ Two of the cyclos share at least three ring members (e.g., protoveratrine, 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}
33  DF  .~.~.~.~ Heptacyclo ring system having the six-membered hetero ring as one of the cyclos {2}
34.~.~.~.~.~ Two of the cyclos share at least three ring members (e.g., protoveratrine, etc.) {1}
35  DF  .~.~.~.~.~.~> At least three ring hetero atoms in the heptacyclo ring system

DEFINITION

Classification: 546/34

Two of the cyclos share at least three ring members (e.g., protoveratrine, etc.):

(under subclass 33) Compounds wherein at least three ring members of one cyclo are ring members of an additional cyclo in the heptacyclo ring system (i.e., bridged).

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