36201ES 3,3'-Diaminobenzidine (DAB) Tetrahydrochloride 3,3'-二氨基联苯胺四盐酸 3,3'-Diaminobenzidine (DAB) Tetrahydrochloride 3,3'-二氨基联苯胺四盐酸 1 g 翌圣生物 $25.00 询价询 详情详