Boc-D-His(Tos)-OH Product Catalog # Size Price (USD) Quantity Boc-D-His(Tos)-OH110903-5G5 g$278.00 - Boc-D-His(Tos)-OH-5g quantity + Boc-D-His(Tos)-OH110903-25G25 g$998.00 - Boc-D-His(Tos)-OH-25g quantity + Add to cart Description Synonym: Boc-Nim-4-toluenesylfonyl-D-histidine CAS #: 69541-68-0 Molecular Formula: C18H23N3O6S Molecular Weight: 409.5