7-[1,6-dihydroxy-3-methyl-7-oxo-5-propan-2-yl-8-[[[3-(trifluoromethyl) phenyl]amino]methylidene]naphthalen-2-yl]-3,8-dihydroxy-6-methyl-4-pro pan-2-yl-1-[[[3-(trifluoromethyl)phenyl]amino]methylidene]naphthalen-2 -one