Vinamidine-d3 N-Formyl-1-hydroxysulfate is the labeled analogue of Vinamidine N-Formyl-1-hydroxysulfate (V313960), an adduct of Vinamidine, the major metabolite of Vinblastine (V314000), an antitumor alkaloid isolated from periwinkle, Vinca rosea Linn., Apocynaceae; inhibits microtubule assembly. An antineoplastic.