4-Bromo-1-(oxan-4-yl)-1H-pyrazole is an intermediate in the synthesis of 3,4,5-Trimethoxy-2-nitro Acetophenone (T795510). 3,4,5-Trimethoxy-2-nitro acetophenone is an intermediate used to prepare substituted 4-alkyl-2(1H)-quinazolinones as potential cardiotonics. It can be also used as an intermediate to synthesize 2-Amino-3,4,5-trimethoxybenzophenones as potent tubulin polymerization inhibitors.