Showing structure for (2s)-3-(3,4-dihydroxyphenyl)-1-methoxy-1-oxopropan-2-yl (2e)-3-[(1s,4s,5s,6r,7r,8s)-5-(3,4-dihydroxyphenyl)-6-({[(2s)-3-(3,4-dihydroxyphenyl)-1-methoxy-1-oxopropan-2-yl]oxy}carbonyl)-7,8-dihydroxybicyclo[2.2.2]oct-2-en-2-yl]prop-2-enoate