2-Butenoic acid, 2-methyl-, (1R,7aR)-7-(((2S,3R)-2,3-dihydroxy-2-(1-methylethyl)-1-oxobutoxy)methyl)-2,3,5,7a-tetrahydro-1H-pyrrolizin-1-yl ester, (2E)- 82535-76-0