53633-35-5 6-Methyl-2(3-oxobenzo(b)thien-2(3H)-ylidene)benzo(b)thiophen-3(2H)-one 6-Methyl-2-(3-oxobenzo(b)thien-2(3H)-ylidene)benzo(b)thiophene-3(2H)-one Benzo(b)thiophen-3(2H)-one, 6-methyl-2-(3-oxobenzo(b)thien-2(3H)-ylidene)- EINECS 258-677-5