2-Propen-1-one, 3-(l,3-benzodioxol-5-yl)-1-(1,4-dioxo- 2,6,7-trimethylquinoxalin-3-yl)- NSC621487 Quinoxaline, 3-[3-(l,3-benzodioxol-5-yl)-1-oxo-2-propen-1-yl]-2,6,7-trimethyl-, 1,4-dioxide