US PATENT SUBCLASS 546 / 33
.~.~.~.~ Heptacyclo ring system having the six-membered hetero ring as one of the cyclos

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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.~.~.~.~ Heptacyclo ring system having the six-membered hetero ring as one of the cyclos {2}
34  DF  .~.~.~.~.~> Two of the cyclos share at least three ring members (e.g., protoveratrine, etc.) {1}
36  DF  .~.~.~.~.~> Plural ring hetero atoms in the heptacyclo ring system {1}

DEFINITION

Classification: 546/33

Heptacyclo ring system having the six-membered hetero ring as one of the cyclos:

(under subclass 26) Compounds in which the polycyclo ring system consists of exactly seven rings.

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