US PATENT SUBCLASS 549 / 359
.~.~.~.~.~.~ Tricyclo ring system having the hetero ring as one of the cyclos


Current as of: June, 1999
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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}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
356  DF  .~.~.~ The hetero ring is six-membered {9}
357  DF  .~.~.~.~ Plural ring oxygens in the hetero ring (e.g., 1,2-dioxin, etc.) {4}
358  DF  .~.~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {2}
359.~.~.~.~.~.~ Tricyclo ring system having the hetero ring as one of the cyclos {2}
360  DF  .~.~.~.~.~.~.~> Two of the cyclos share at least three ring members (i.e., bridged)
361  DF  .~.~.~.~.~.~.~> Three or more ring oxygens in the tricyclo ring system (e.g., actinospectacin, etc.)


DEFINITION

Classification: 549/359

(under subclass 358) Compounds in which the polycyclo ring

system consists of exactly three rings.

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