We are the prefessional manufactor of amino acid in China. We provide high quality, lowest price and reliable service. Product Name: Cbz-Pyr-OH CAS #: 32159-21-0 Synonyms: Cbz-L-Pyroglutamic acid Molecular Formula: C13H13NO5 Molecular Weight: 263.25 Appearance:White to off-white crystalline powder Purity: 98%