US PATENT SUBCLASS 544 / 99
.~.~.~.~.~ Polycyclo ring system having the oxazine ring as one of the cyclos

Current as of: June, 1999
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544 /   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 having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
63  DF  .~.~.~ Six-membered hetero ring consists of oxygen, nitrogen and carbon (e.g., 1,2-oxazines, etc) {8}
98  DF  .~.~.~.~ 1,4-Oxazines {2}
99.~.~.~.~.~ Polycyclo ring system having the oxazine ring as one of the cyclos {3}
100  DF  .~.~.~.~.~.~> Anthrone or anthraquinone in the polycyclo ring system
101  DF  .~.~.~.~.~.~> Tricyclo ring system having the oxazine ring as one of the cyclos {1}
105  DF  .~.~.~.~.~.~> Bicyclo ring system having the oxazine ring as one of the cyclos (e.g., benzoxazines, etc.)

DEFINITION

Classification: 544/99

(under subclass 98) Compounds wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.

(1) Note. The positions of the six-membered hetero ring when it is part of a polycyclo ring system are numbered as if it were a single ring.