(1R,3S,5R,6S,9R,11R,15S,16S,17S,18S,33S,35S,36R,37R)-33-[(3-Amino-3,6-dideoxy-β-L-galactopyranosyl)oxy]-1,3,5,6,9,11,17,37-octahydroxy-15,16,18-trimethyl-13-oxo-14,39-dioxabicyclo[33.3.1]nonatriaco
nta-19,21,23,25,27,29,31-heptaene-36-carboxylic acid