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. 2019 Oct 17;7:242. doi: 10.3389/fcell.2019.00242

FIGURE 1.

FIGURE 1

Molecular structures of Naphthoquinone Tryptophan hybrids: (A) 1,4-naphthoquinone-2-yl-L-tryptophan (NQTrp), (B) Chloro-Naphthoquinone Tryptophan (Cl-NQTrp), (C) 1,4-naphthoquinone-2-yl-D-tryptophan (NQ-D-Trp), (D) N-methylamino-NQTrp (AM), (E) N-methylindole-NQTrp (IM), (F) N,N-dimethyl-NQTrp (DM), (G) Mannitol-Click-NQTrp (MCN), (H) Mannitol-2G-NQTrp (M2N), and (I) Mannitol-3G-NQTrp (M3N).