| abstract |
This pharmaceutical composition for treatment or prevention of chronic obstructive pulmonary disease contains a compound represented by general expression (I) (In the formula, the two Rs independently represent a C1-3 alkyl group, or represent groups that, bonded together, form a C2-5 alkylene group. L2 represents a single bond, etc., L3 represents a single bond, etc., R1, R2 and R3 independently represent an optionally substituted linear or branched C1-4 alkyl group, etc., R4 represents an optionally substituted linear or branched C1-6 alkyl group, etc., and R5 represents a hydrogen atom, etc.), or a pharmacologically acceptable salt thereof. |