4H-furo[3,4-d][1,3]thiazine
6c-(4-nitro-benzylideneamino)-(5ar)-5a,6-dihydro-4H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-7-one
6c-amino-(5ar)-5a,6-dihydro-4H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-7-one
N-(4-chloromethyl-furan-3-yl)-formamide
2-thienylacetic acid chloride