4H,5H-cyclopenta[4,5]thieno[2,3-d][1,3]oxazin-4-one, 6,7-dihydro-2-(2-methylphenyl)-;6-o-Tolyl-2,3-dihydro-1H-5-oxa-8-thia-7-aza-cyclopenta[a]inden-4-one
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