The molecule is a phenolate anion obtained by deprotonation of the 2-hydroxy group of (S)-5'-oxoaverantin. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a (S)-5'-oxoaverantin.
3,6,8-trihydroxy-2-[(1S)-1-hydroxy-5-oxohexyl]-9,10-dioxoanthracen-1-olate