Fmoc-Cys(tBu)-OH Product Catalog # Size Price (USD) Quantity Fmoc-Cys(tBu)-OH100507-5G5 g$71.00 - Fmoc-Cys(tBu)-OH-5g quantity + Fmoc-Cys(tBu)-OH100507-25G25 g$197.00 - Fmoc-Cys(tBu)-OH-25g quantity + Add to cart Description Synonym: N-α-Fmoc-S-t-butyl-L-cysteine CAS #: 67436-13-9 Molecular Formula: C22H25NO4S Molecular Weight: 399.5