1 HA7 (7s)-3-hydroxy-4,5,6,7-tetrahydroisoxazolo[5,4-C]pyridine-7-carboxylic acid 1.000 2 HA5 (5r)-3-hydroxy-4,5,6,7-tetrahydroisoxazolo[5,4-C]pyridine-5-carboxylic acid 0.857 3 UR5 (+)-3-hydroxy-4,5,6,6a-tetrahydro-3ah-pyrrolo[3,4-D]isoxazole-6-carboxylic acid 0.786 4 UR8 (-)-3-hydroxy-4,5,6,6a-tetrahydro-3ah-pyrrolo[3,4-D]isoxazole-6-carboxylic acid 0.786 5 EI7 4,5,6,7-tetrahydro-[1,2]oxazolo[5,4-C]pyridin-3-one 0.769