Is anyone able to get a copy of "Heterocyclic dicarboxylic acid esters. II. Reaction of 2,3-bis(methoxycarbonyl)-4,5-dihydrofurans with hydrazine and 1,2,3,6-tetrahydropyrdazine. Synthesis of 3-hydroxy-4-(2-hydroxyalkyl)-5-pyrazolecarboxylic acid derivatives" By: Lehmann, Jochen; Kraatz, Udo; Korte, Friedhelm?
Greatly appreciated...