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Biosyntheses of cittilins (A), atropopeptides (atropitides) (B) and the structures of amyxirubins (C), cihunamides, compounds 99 and 101 (D). All the P450s above catalyze leader peptide dependent multicoupling or monocoupling reactions. The core peptides in precursors are highlighted in brown. The nascent chemical bonds are highlighted in blue.
