2,3-Dihydro-6-hydroxybenzo[b]furan-3(2H)-one6-Hydroxybenzo[b]furan-3(2H)-one6-hydroxy-2,3-dihydrobenzo[b]furan-3-one6-hydroxybenzofuran-3(2H)-one6-Hydroxy-3-coumaranone6-hydroxy-1-benzofuran-3(2H)-one6-Hydroxy-2H-benzofuran-3-one6-Hydroxy-3-coumaranone6-羟基-2H-苯并呋喃-3-酮6-Hydroxy-2,3-dihydro-1-benzofuran-3-one6-Hydroxy-2H-benzofuran-3-one