Tags: melting point of ethyl 4-oxo-4H-pyrimido[1,2-b]pyridazine-3-carboxylate | boiling point of ethyl 4-oxo-4H-pyrimido[1,2-b]pyridazine-3-carboxylate | density of ethyl 4-oxo-4H-pyrimido[1,2-b]pyridazine-3-carboxylate | refractive index of ethyl 4-oxo-4H-pyrimido[1,2-b]pyridazine-3-carboxylate
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