Product Description Topotecan Other Details Molecular Formula: C23H23N3O5 Molecular Weight: 421.45 CAS Number: 123948-87-8 Minimum Purity: 0.95 UN Number: 0 Dangerous Goods Class: 0 Packing Group: 0 Storage Temperature: 0 Sizes 1: 250mg Leadtime:65 Days Sizes 2: 1g Leadtime:65 Days Sizes 3: 0 Leadtime:0