3(2H)-Benzofuranone, 6,7-dihydroxy- 6,7-Dihydroxy-2H-benzofuran-3-one 6,7-Dihydroxy-3-coumaranone 6,7-Dihydroxycoumaranon 6,7-Dihydroxycoumaranone 6272-27-1 EINECS 228-459-4 NSC 37408