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structure structure (organic substances) K 9000 13 -052 Ultraviolet Stabilizers of the 2-(Hydroxyphenyl)benzotriazole Class. Influence of Substituents on Structure and Spectra -(X-ray analyses, absorption, IR and fluorescence spectra of 8 title compounds such as (I) substituted in the phenol substituent and 4 title compounds such as (II) substituted in both phenyl rings). -(RIEKER, J.; LEMMERT-SCHMITT, E.; GOELLER, G.; ROESSLER, M.; STUEBER, G. J.; SCHETTLER, H.; KRAMER, H. E. A.; STEZOWSKI, J. J.; HOIER, H.; HENKEL, S.; SCHMIDT, A.; PORT, H.; WIECHMANN, M.; RODY, J.; RYTZ, G.; SLONGO, M.; BIRBAUM, J.-L.; J.