An object of the present invention is to provide a compound having an anti-inflammatory activity or a pharmacologically acceptable salt thereof.The solution of the present invention is a compound of general formula (1) or a pharmacologically acceptable salt thereof.wherein the symbols in the formula are defined below: R1: e.g., a C1-C6 alkyl group; R2: a C1-C6 alkyl group; A: e.g., an oxygen atom; and R3: e.g., a C1-C6 alkyl group.