105701-66-4 3-Hydroxy-4,5,6,7-tetrahydro-isoxazolo(4,5-c)pyridine-4-carboxylic acid 4-Hpca Isoxazolo(4,5-c)pyridine-4-carboxylic acid, 2,3,4,5,6,7-hexahydro-3-oxo-, (+-)-