US PATENT SUBCLASS 548 / 356.5
.~.~.~.~ Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- or 10- positions (e.g., anthrone, anthraquinone, etc.)

Current as of: June, 1999
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548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
356.1  DF  .~.~.~ 1,2-diazoles (including hydrogenated) {8}
356.5.~.~.~.~ Polycyclo ring system containing anthracene configured ring system having at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly at the 9- or 10- positions (e.g., anthrone, anthraquinone, etc.) {1}
357.1  DF  .~.~.~.~.~> Additional polycyclo ring system having at least three cyclos attached directly or indirectly to the anthrone or anthraquinone by nonionic bonding

DEFINITION

Classification: 548/356.5

(under subclass 356.1) Compounds having a polycyclo ring system which is or contains the anthracene ring configuration with at least one double bond between ring members and having oxygen single bonded or any atom double bonded directly to the ring system at the 9- and 10- positions (e.g., anthraquinones, etc.) or at the 9- or 10- positions (e.g., anthrones, etc.).

(1) Note. The anthracene configured ring system is numbered as follows: [figure]

(2) Note. This subclass contains, for example: [figure] [figure]