with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical

Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups > Five-membered rings > Thiadiazoles; Hydrogenated thiadiazoles > not condensed with other rings > 1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles > with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical

Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00 > Five-membered rings > Thiadiazoles; Hydrogenated thiadiazoles > not condensed with other rings > 1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles > with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical