8-Hydroxy-3-methoxy-1,4,6,9-tetramethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7-carboxylic acid methyl ester

1,4,6,9-Tetramethyl-3-methoxy-8-hydroxy-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7-carboxylic acid methyl ester