About HIRAI K
About Sankyo Co. Ltd., Tokyo, JPN
About NAITO A
About Sankyo Co. Ltd., Tokyo, JPN
About Tetrahedron Letters
About microbiological reaction
About azetidinones
About Four-membered heterocyclic compounds
About Stereochemistry of organic reaction
About Metabolism and nutrition
About DL
About 誘導体
About 生物学的変換