Food Acidity RegulatorsChina High Purity 99.0%Min. N-Boc-Trans-4-Hydroxy-L-Proline Methyl Ester CAS No.: 74844-91-0, Find details about China 74844-91-0, N-Boc-Trans-4-Hydroxy-L-Proline Methyl Ester from High Purity 99.0%Min. N-Boc-Trans-4-Hydroxy-L-Proline Methyl Ester CAS No.: 74844-91-0