120642-21-9 2-Aminoethanethiol dihydrogen phosphate (ester) 5746-40-7 Cysteamine S-phosphate Cysteamine-S-phosphate Ethanethiol, 2-amino-, S-ester with phosphorothioic acid (7CI) Ethanethiol, 2-amino-, dihydrogen phosphate (ester) NSC 118587 Phosphocysteamine Phosphorothioic acid, S-(2-aminoethyl) ester (8CI) S-(2-Aminoethyl) phosphorothioate WR 638