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. 2017 May 6;22(5):755. doi: 10.3390/molecules22050755
polymer/ppm C1 C2 C3 C4 C5
PI 30.44 123.35 133.30 24.60 21.38
sP(EP) 33.37 124.62 134.75 30.31 18.73
iP(EP) 33.38 124.73 134.72 30.42 18.84