(R-(R*,R*))-3,3'-Dithiobis(2-amino-N-2-naphthylpropionamide) 1259-69-4 Cystine-di-beta-naphthylamide EINECS 215-022-8 Propanamide, 3,3'-dithiobis(2-amino-N-2-naphthalenyl-, (R-(R*,R*))-