4464-33-9 Benzene, 1,1'-(2,3-diisocyano-1,3-butadiene-1,4-diyl)bis(4-methoxy- (9CI) Bis(p-methoxybenzylidene)ethylene isocyanide Ethylene isocyanide, bis(p-methoxybenzylidene)- Xanthocillin X dimethyl ether Xanthocillin X permethyl ether