1,4(2H)-pyridinedicarboxylic acid, 3,6-dihydro-5-hydroxy-, 4-ethyl 1-methyl ester 4-ethyl 1-methyl 5-hydroxy-3,6-dihydropyridine-1,4(2H)-dicarboxylate InChI=1/C10H15NO5/c1-3-16-9(13)7-4-5-11(6-8(7)12)10(14)15-2/h12H,3-6H2,1-2H