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. 2021 Apr 16;6:16. doi: 10.1186/s41181-021-00130-3

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© The Author(s) 2021, corrected publication 2021

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Fig. 4 — HPLC UV chromatograms of (a) FAPI-04 precursor (UV-254 nm), (b) FAPI-46 precursor (UV-264 nm) on a ACE-3 C18 150 × 3.0 mm column, mobile phase: %13 ACN / %87 Water (% 0,1 TFA), isocratic flow: 0.6 ml/min., FAPI-04 RT: 3.5–4.5 min., FAPI-46 RT: 5–6 min