Provided are a fluorous-tag-introduced fluoroamine of a general formula, its production method, a method of fluorination of a substrate having functional group containing oxygen with the fluoroamine serving as a fluorinating agent, and a method of recovering a fluorous-tag-introduced amide after the fluorination. The message comprises a number of headers and a signature comprising a digital signature and a version of the headers. By improving visible light transmission characteristics when the ultraviolet light is irradiated in this way, a breakdown of crystal can be prevented and a stabilization of output characteristics at high output can be realized. If the source code does not reside in the database, a thorough scan of the source code may be conducted.