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. Author manuscript; available in PMC: 2017 Jan 21.
Published in final edited form as: Org Biomol Chem. 2015 Dec 3;14(3):1049–1064. doi: 10.1039/c5ob02241j

Figure 2.

Figure 2

1H NMR spectral comparison of: A) methyl pheoporbide a (21); B) β-ketoamide 22 (*contains 10% of ring-opened product 24); and C) 131-ethylene-diaminyl-chlorin e6 dimethyl ester 24. Assignments: a, 132 CH; b, 133 CO2CH3; c, 151 CH2; d, 152 CO2CH3.