2-Butenoic acid, 3-methyl-4-(tetrahydro-3,4-dihydroxy-5-((3-(2-hydroxy-1-methylpropyl)oxiranyl)methyl)-2H-pyran-2-yl)-, (2S-(2alpha(E),3beta,4beta,5alpha(2R*,3R*(1R*,2R*))))- 66262-68-8 Monic acid A