5,9,10-trimethoxy-3-methyl-3,4-dihydro-1H-benzo[g]isochromene

4,4,5,5-tetramethyl-2-(5,9,10-trimethoxy-3-methyl-3,4-dihydro-1H-benzo[g]isochromen-7-yl)-1,3,2-dioxaborolane