1,3-Propanediol, 2-methyl-2-propyl-, bis(isopropylideneiminocarbamate) 2-Methyl-2-propyl-1,3-propanediol N,N'-bis(isopropylimino)dicarbamate 2-Methyl-2-propyl-1,3-propanediol bis(isopropylideneiminocarbamate) 25652-07-7