US PATENT SUBCLASS 549 / 12
.~.~.~.~ Polycyclo ring system having at least three cyclos and having the hetero ring as one of the cyclos

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549 /   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) {2}
1  DF  .~.~ Sulfur containing hetero ring (e.g., thiiranes, etc.) {9}
9  DF  .~.~.~ The hetero ring has at least seven members {2}
12.~.~.~.~ Polycyclo ring system having at least three cyclos and having the hetero ring as one of the cyclos

DEFINITION

Classification: 549/12

(under subclass 9) Compounds wherein the hetero ring having at least seven members is a cyclo in a polycyclo ring system containing at least three cyclos.

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