1,3,2,4-Dithiadiphosphetane, 2,4-bis(4-methoxyphenyl)-, 2,4-disulfide 114668-60-9 136390-48-2 19172-47-5 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide 2,4-Bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulphide 72728-81-5 94367-93-8 EINECS 242-855-4 Lawesson's reagent NSC 150550