different between thiopyran vs thioxanthene

English

thiopyran (plural thiopyrans)

(organic chemistry) An unsaturated six-membered heterocycle consisting of five carbon atoms. one sulfur atom and two double bonds

thio- +? xanthene

thioxanthene (plural thioxanthenes)

(organic chemistry) The tricyclic heterocycle (sulfur analogue of xanthene) consisting of two benzene rings fused to that of thiopyran

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