66759-69-1 Bis(N-ethylidene vindesine)disulfide Bis(N-ethylidene vindesine)disulfide, disulfate Bis-vds Vincaleukoblastine, 3,3''-(dithiobis(2,1-ethanediyliminocarbonyl))bis(O4-deacetyl-3-de(methoxycarbonyl)-