2-Butenoic acid, 2-methyl-, 7-((2,3-dihydroxy-2-(1-methylethyl)-1-oxobutoxy)methyl)-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester, N-oxide, (1R-(1alpha(E),7(2S*,3S*),7abeta))- 72698-57-8 Symphytine oxide