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World J Ophthalmol. Nov 12, 2013; 3(4): 32-37
Published online Nov 12, 2013. doi: 10.5318/wjo.v3.i4.32
Figure 1
Figure 1 Chemical structure of melatonin and analogues. Melatonin (N-acetyl-5-methoxytryptamine), IIK7 (N-butanoyl-2-(2-methoxy-6H-isoindolo[2,1-a]indol-11-yl)ethanamine) and 5-MCA-NAT (5-methylcarboxyamino-N-acetyltryptamine).