The molecule is an organosulfonate oxoanion obtained by the deprotonation of the sulfate group of eurysterol B hydrogen sulfate. It is a conjugate base of a eurysterol B sulfonic acid.
[(1R,2R,5R,6R,9R,10R,12R,13R,15S)-12,13-dihydroxy-5-methyl-6-[(E,2R)-6-methylhept-3-en-2-yl]-19-oxapentacyclo[8.7.2.01,13.02,10.05,9]nonadecan-15-yl] sulfate