The molecule is an organic anion resulting from the deprotonation of the enol moiety of equisetin. Major species at pH 7.3. It has a role as a quorum sensing inhibitor. It is a conjugate base of an equisetin.
(Z)-[(1S,2R,4aS,6R,8aR)-1,6-dimethyl-2-[(E)-prop-1-enyl]-4a,5,6,7,8,8a-hexahydro-2H-naphthalen-1-yl]-[(5S)-5-(hydroxymethyl)-1-methyl-2,4-dioxopyrrolidin-3-ylidene]methanolate