2-Thiophenecarboxylate de 7-(2,3-dihydroxypropyl)theophylline [French] 2-Thiophenecarboxylic acid, 1-((1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purin-7-yl)methyl)-1,2-ethanediyl ester 37419-58-2