3H,8H-Dipyrazolo[1,5-a:1',5'-d]pyrazine-2,7-dicarboxylic acid, 3a,4,8a,9-tetrahydro-4,9-dihydroxy-3a,8a-dimethyl-, diethyl ester, (3a.alpha.,4.beta.,8a.beta.,9.alpha.)- 60323-59-3 NSC278339