2,3,7-Trihydroxy-9-phenyl-6-fluorone 3H-Xanthen-3-one, 2,6,7-trihydroxy-9-phenyl- 9-Phenyl-2,3,7-trihydroxy-6-fluorone 975-17-7 Fluorone black Fluorone, phenyl- NSC2608 Phenylfluorone