US PATENT SUBCLASS 548 / 306.1
.~.~.~.~.~.~.~.~ The additional hetero ring contains nitrogen as the only ring hetero atom [e.g., 2-(2'-imidazolin-2'-yl)-benzimidazole; 1-p-chlorophenyl-3- pyrrolidin-1'- yl-propyl benzimidazolone, etc.]

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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}
300.1  DF  .~.~.~ 1,3-diazoles (including hydrogenated) {9}
301.7  DF  .~.~.~.~ Polycyclo ring system having the diazole ring as one the cyclos {2}
302.7  DF  .~.~.~.~.~ Bicyclo ring system having the diazole ring as one of the cyclos {2}
304.4  DF  .~.~.~.~.~.~ The other ring is a benzene ring {8}
304.7  DF  .~.~.~.~.~.~.~ Additional hetero ring attached directly or indirectly to the diazole ring by nonionic bonding (e.g., methyl( 5-[2-(2-thienyl)-1,3-dioxolan -2-yl]-1H-benzimidazol-2-yl) carbamate, etc.) {2}
306.1.~.~.~.~.~.~.~.~ The additional hetero ring contains nitrogen as the only ring hetero atom [e.g., 2-(2'-imidazolin-2'-yl)-benzimidazole; 1-p-chlorophenyl-3- pyrrolidin-1'- yl-propyl benzimidazolone, etc.]

DEFINITION

Classification: 548/306.1

(under subclass 304.7) Compounds wherein nitrogen is the only ring hetero atom in the additional hetero ring.

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