The molecule is the dihydrogen arsenothioate resulting from the formal condensation of the thiol group of mycothiol with arsenic acid. It is a conjugate acid of an arseno-mycothiol(1-).
[(2R)-2-acetamido-3-[[(2R,3R,4R,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-[(2R,3R,5S,6R)-2,3,4,5,6-pentahydroxycyclohexyl]oxyoxan-3-yl]amino]-3-oxopropyl]sulfanylarsonic acid