The molecule is the dianion resulting from the removal of both protons from the arsenate group of arseno-mycothiol. It is a conjugate base of an arseno-mycothiol(1-).
(2R)-2-acetamido-3-arsonatosulfanyl-N-[(2R,3R,4R,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-[(2R,3S,5R,6R)-2,3,4,5,6-pentahydroxycyclohexyl]oxyoxan-3-yl]propanamide