・maingroup

Heterocyclic compounds containing condensed hetero ring systems[2]

Note(s) Groups C07D 451/00-C07D 517/00cover compounds containing one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system, with or without other non-condensed hetero rings [2,3,5]For the purpose of classification in groups C07D 451/00-C07D 519/00, the degree of hydrogenation of the ring system is not taken into consideration For the purpose of classification in groups C07D 451/00-C07D 463/00, C07D 473/00-C07D 477/00, C07D 489/00, C07D 499/00-C07D 507/00, the wording of the groups has to be understood, in the absence of an indication to the contrary, as including ring systems further condensed with carbocyclic rings or ring systems, but excluding ring systems further condensed with other hetero rings, either directly or through a common carbocyclic ring system, e.g. sparteine [figure] is classified in group C07D 471/22, not in group C07D 455/02 In groups C07D 471/00, C07D 487/00, C07D 491/00-C07D 498/00 or C07D 513/00-C07D 517/00, the subdivision is based on the number of relevant hetero rings