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method for the preparation of a beta cyaanvinylanilinederivaat and method for protecting a substrate against the influence of ultraviolet rays.using a beta cyaanvinylanilinederivaat as absorption agent for ultraviolet radiation.
method for the preparation of a beta cyaanvinylanilinederivaat and method for protecting a substrate against the influence of ultraviolet rays.using a beta cyaanvinylanilinederivaat as absorption agent for ultraviolet radiation.
