2-Butenoic acid, 2-methyl-, 7-((2,3-dihydroxy-2-(1-hydroxyethyl)-3-methyl-1-oxobutoxy)methyl)-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester, hydrochloride EM9252420 Echimidine hydrochloride