2-Butenedioic acid,2-methyl-, 1-[(1S,3R,5S,6R)-6-hydroxy-8-methyl-8-azabicyclo[3.2.1]oct-3-yl]4-[(1R,3R,5S,6R)-8-methyl-6-[[(2E)-2-methyl-1-oxo-2-buten-1-yl]oxy]-8-azabicyclo[3.2.1]oct-3-yl]ester, (2E)-