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. 2020 Feb 2;25(3):642. doi: 10.3390/molecules25030642

Figure 1.

Figure 1

Molecular structures of 2(5H)-furanone derivatives F70 [25], F104 [17], F105 [17], and F145 [26]. The red circle in the structure of F145 indicates a fluorescent 2-(benzothiazol-2-yl)-4-bromophenol (BTBP) moiety.