This disclosure relates to use of certain aldehyde compounds for treating pulmonary fibrosis, hypoxia, and connective tissue and autoimmune disease such as scleroderma, lupus, arthritis and related conditions in a mammal.本揭露涉及某些醛化合物用於在哺乳動物中治療肺纖維化、缺氧、以及結締組織和自身免疫性疾病如硬皮病、狼瘡、關節炎以及相關的病症之用途。