3-Cyclobutoxy-4-difluoromethoxy-benzaldehyde

3-Cyclobutoxy-4-(difluoromethoxy)benzaldehyde is an intermediate for the synthesis of O-Des(Cyclopropylmethyl) O-cyclobutyl Roflumilast (C982940), which is an intermediate used in the synthesis of Roflumilast (R639700). Roflumilast is a selective phosphodiesterase 4(PDE4) inhibitor. Antiasthmatic; used in treatment of chronic obstructive pulmonary disease.