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. 2017 Jul 31;7:6909. doi: 10.1038/s41598-017-06947-w

Figure 4.

Figure 4

Bright-field microscopy images of crystals of 3 in water before and after UV irradiation (330–385 nm, 290 mW/cm2) for 5, 10, 20, 30 and 60 min at room temperature. The region between the slide glass and cover glass of the sample shown in Fig. S8 was filled with water before this observation.