Novel pyranochromone derivatives having the general formula: ##STR1## wherein R.sub.1 represents hydrogen atom, an alkali metal or an alkyl group containing 1-4 carbon atoms; R.sub.2, R.sub.3 and R.sub.4 represent hydrogen atom or an alkyl group containing 1-4 carbon atoms respectively, provided that both R.sub.3 and R.sub.4 are not hydrogen atom at the same time; R.sub.5 and R.sub.6 represent an alkyl group containing 1-4 carbon atoms respectively; and R.sub.7 represents hydrogen atom, hydroxyl group, an alkyl group containing 1-4 carbon atoms or an alkoxyl group containing 1-4 carbon atoms. The novel medicaments comprising predominantly the above derivative are effective for the treatment of allergic diseases.
新型
吡喃酮并
色酮衍
生物,具有通式:##STR1##其中R1代表氢原子、碱
金属或含有1-4个碳原子的烷基;R2、R3和R4分别代表氢原子或含有1-4个碳原子的烷基,但R3和R4不能同时为氢原子;R5和R6分别代表含有1-4个碳原子的烷基;R7代表氢原子、羟基、含有1-4个碳原子的烷基或含有1-4个碳原子的烷氧基。主要包含上述衍
生物的新型药物对于治疗过敏性疾病有效。