182824-33-5 4-Oxo-4-(((3R,5aS,6R,8aS,9R,10S,12R,12aR)-3,6,9-trimethyldecahydro-3,12-epoxypyrano(4,3-j)-1,2-benzodioxepin-10-yl hydrogen butanedioate Artesunate Artesunate [USAN] Butanedioic acid, mono((3R,5aS,6R,8aS,9R,10S,12R,12aR)-decahydro-3,6,9-trimethyl-3,12-epoxy-12H-pyrano(4,3-j)-1,2-benzodioxepin-10-yl) ester