4-(N-benzyl-N-methylamino)pyridine acid salts and use in prepara
4-methyl-1-pentene polymer, process for producing the same...
4-Peroxyester derivatives of trimellitic anhydride
4-Vinyl-2-methylene butanedioic acid compounds
4-[(meth)acrylamidomethyl]-pyrazoles and -isoxazoles, their prep