roflumilast molecular structure 3d, flat model, daxas, structural chemical formula view from a microscope

roflumilast daxas phosphodiesterase type inhibitors pde4 antiinflammatory chronic obstructive pulmonary disease copd molecule molecular structure chemical formula 3d model c17h14cl2f2n2o3 atom chemistry inflammation lung asthma carbon immune bronchitis hydrogen chlorine fluorine atoms oxygen atomic nitrogen skeletal generic medicine pharmaceutical pharmacy therapy treatment drug medicinal pharmacology