5,6-Dimethoxy-1H-indazole is a phosphite that has been used as an intermediate in the synthesis of some pharmaceuticals. It has been shown to have hypotensive effects in rats and depressant effects in mice. The nitro group on 5,6-dimethoxy-1H-indazole can be reduced to an aminopropyl group by reaction with chloride and methyl alcohol or piperazine. This reaction produces two products: 1) a chloro compound that is not pharmacologically active and 2) a methylated product that retains all the original activity of 5,6-dimethoxy-1H-indazole. 5,6-Dimethoxy-1H-indazole also interacts with DNA by binding to nitrous oxide (N2O), which is present at high levels in clinical settings such as dentists' offices. Nitrous oxide reacts with 5,6-dimethoxy-1H