1(2H)-PhthalazinoneBenzo[d]pyridazin-1(2H)-onePhthalazin-1(2H)-onePhthalazone1,2-Dihydro-1-oxophthalazine1-(2H)-酞嗪酮PhthalazoneBenzo[d]pyridazin-1(2H)one1-羟基酞嗪1,2H-PHTHALAZONEphthalazinonePhthalazin-1-one1(2H)-Phthalazinonephthalazonephthalazin-1(2H)-one