Dipry dip diphenyl selenium dichloride Dipentodon longipedicellatus diphosphopyridine nucleotide diphenylmethane bismaleimide diphenylaminearsine chloride Diphenylmethane diisocyanate diphenyl methyl acid isomers Diplococcus pharyngis fiavus diphenyl methane dicarbamate Diphenylmethyenebismaleimide