C07D 513/22

Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups [CPC: C07D463/00], [CPC: C07D477/00] or [CPC: C07D499/00] - [CPC: C07D507/00] in which the condensed system contains four or more hetero rings