159792-14-0 LU-25-109T Pyridine, 5-(2-ethyl-2H-tetrazol-5-yl)-1,2,3,6-tetrahydro-1-methyl-, (2R,3R)-2,3-dihydroxybutanedioate (1:1) Pyridine, 5-(2-ethyl-2H-tetrazol-5-yl)-1,2,3,6-tetrahydro-1-methyl-, (R-(R*,R*))-2,3-dihydroxybutanedioate (1:1)