11-[2-(4-bromophenyl)-2-oxoethyl]-4,5-dihydroxy-3,4,5-trimethyl-2,6-dioxo-3,4,5,6,8,10,12,13,13a,13b-decahydro-2H-[1,6]dioxacycloundecino[2,3,4-gh]pyrrolizin-11-ium