920745-15-9 8,11,14-Trioxa-2,5-diazapentadecanoic acid,5-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)-6-oxo-,phenylmethyl ester 920745-48-8 8,11-Dioxa-2,5-diazadodecanoic acid,5-(3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl)-6-oxo-,phenylmethyl ester