| http://www.w3.org/ns/prov#value | - The GAG may be reacted with the photoreactive compound as it is, but it is generally used in the form of a salt: with alkali metal such as sodium, potassium, etc., alkali earth metal such as magnesium, calcium, etc., tertiary amine such as tri-n-butylamine, triethylamine, pyridine, etc. and the like.
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