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Butanedioic acid,2,2-bis[[(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)sulfonyl]methyl]-1,3-propanediyl ester, compd. with N,N-diethylethanamine(1:2) related products: