. 2017 Oct 27;8:769. doi: 10.3389/fphar.2017.00769
Copyright © 2017 Guan, Li, Wang, Yue, He, Luo, Su, Liao and Shi.
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Figure 1.
Mass spectra of CPT-11 (A), SN-38 (B), SN-38G (C), and CPT (ISTD) (D).