6,7-Dichloro-1,4-dihydroquinoxaline-2,3-dione 98%6,7-Dichloro-2,3-dioxo-1,2,3,4-tetrahydroquinoxaline6,7-Dichloroquinoxaline-2,3-dioneDCQX6,7-Dichloro-2,3-quinoxalinedione2,3-Quinoxalinedione, 6,7-dichloro-1,4-dihydro-6,7-dichloroquinoxaline-2,3(1H,4H)-dione