1,3-Butanediol, toluene 2,4-diisocyanate urethane (1:2) 1-Methylpropane-1,3-diyl bis((3-isocyanatomethylphenyl)carbamate) 68366-14-3 Carbamic acid, (3-isocyanatomethylphenyl)-, 1-methyl-1,3-propanediyl ester EINECS 269-859-9