Nagao, Yukinori published the artcileSyntheses of leuco triphenylmethane derivatives and their UV-VIS spectra, Application of 9-Phenyl-9H-xanthen-9-ol, the publication is Nippon Kagaku Kaishi (1987), 1839-45, database is CAplus.
Leuco triphenylmethane derivatives (I; R = H, Me, OMe, NMe2; Z = O, S, NMe, NPh) were prepared by the condensation of aromatic ketones with substituted benzenes or by Grignard reactions of aromatic ketones with bromoaryl compounds I turned into colored cations in acidic medium. UV-visible spectra in AcOH and H2SO4 were measured and discussed in terms of the effects of substituent R and bridging group Z. A good correlation between λmax of the xanthene derivatives and the Hammett σ value of the substituents was observed, and the effect of the bridging group on the longest λmax was that the bathochromic shift increased as the electron-donating ability of the bridging group decreased except for Z = S. The effects of R and Z were very similar to those of substituents on the Y band in triphenylmethane dyes having substituents on 2 rings.
Nippon Kagaku Kaishi published new progress about 596-38-3. 596-38-3 belongs to alcohols-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Benzene,Alcohol, name is 9-Phenyl-9H-xanthen-9-ol, and the molecular formula is C19H14O2, Application of 9-Phenyl-9H-xanthen-9-ol.
Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts