(1-hydroxy-2,3,5,7a-tetrahydro-1H-pyrrolizin-7-yl)methyl (2Z)-2-methylbut-2-enoate 2-butenoic acid, 2-methyl-, (2,3,5,7a-tetrahydro-1-hydroxy-1H-pyrrolizin-7-yl)methyl ester, (2Z)- InChI=1/C13H19NO3/c1-3-9(2)13(16)17-8-10-4-6-14-7-5-11(15)12(10)14/h3-4,11-12,15H,5-8H2,1-2H3/b9-3