ABT751 5MG. ABT751, A potent microtubule polymerization inhibitor, CAS: 141430-65-1, MF: C18H17N3O4S, Molecular Weight: 371. 41, Purity: greater than or equal to 98%, Appearance: Pink solid, Synonym: N-[2-[(4-Hydroxyphenyl)amino]-3-pyridinyl]-4-methoxybenzenesulfonamide, Size: 5MG