2-{[(6R)-3-({7-[(dimethylamino)dioxo-λ6-sulfanyl]benzo[2,1-c][1,2,5]oxadiazol-4-yl}amino)-1-oxo-6-[(1R,3aS,3bR,4R,5aS,7R,9aS,9bS,11aR,11S)-4,7,11-trihydroxy-9a,11a-dimethylhexadecahydro-1H-cyclopenta[1,2-a]phenanthren-1-yl]heptyl]amino}ethane-1-sulfonic acid