Regioselectivity refers to the preference of a reaction to occur at a specific site within a molecule. In this case, the influence of β-substituents on the regioselectivity of pyrroline ring formation in chlorin synthesis is being studied.
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dibenzyl 7-(2-methoxycarbonylethyl)-5-methoxycarbonylmethyl-2,8-dimethyldipyrromethane-1,9-dicarboxylate
