| http://www.w3.org/ns/prov#value | - In view of these circumstances described above, the present inventors, after extensive investigation, found that Compound (I) is very soluble in solvents, such as ethanol, propylene glycol and polyethylene glycol, with its stability in said solvents being excellent, and that the powder produced by lyophilizing an alkaline solution of Compound (I) does not tend to discolor with length of time elaps
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