p. 3879 - 3884
(1985)
3,5,7,10-tetramethoxy-1,1,9-trimethyl-6H-benzo
11,11a-dihydro-3,5,7-trimethoxy-1,1,9-trimethyl-2H-benzo
9,10-dihydro-1,3,8-trimethoxy-6-methylanthracene
1,3,8-trimethoxy-6-methyl-9,10-anthraquinone
3,5,7,10-tetramethoxy-1,1,9-trimethyl-1H-benzo[cd]pyrene-2,6-dione