22243-91-0 BRN 1476381 N-(Mercaptomethyl)phthalimide-S-(O-methyl)-methylphosphonodithioate O-Methyl-S-(phthalimidomethyl)-methylphosphonodithioate Phosphonodithioic acid, methyl-, O-methyl ester, S-ester with N-(mercaptomethyl)phthalimide