a heterocyclic compound containing a sulfur atom and a nitrogen atom in the ring.
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Dimethyl 1-hydroxy-4-methyl-1-phenyl-1H-pyrrolo<2,1-c>-1,4-thiazine-7,8-dicarboxylate
1,2,3,5-tetraphenyl-1H-pyrrole
3-<(p-bromophenacyl)thio>isoquinoline