6IWT:
reference: The Molecular and Structural Basis of O-methylation Reaction in Coumarin Biosynthesis in Peucedanum praeruptorum Dunn., Zhao Y, Wang N, Sui Z, Huang C, Zeng Z, Kong L, Int J Mol Sci. 2019 Mar 27;20(7). pii: ijms20071533. doi: 10.3390/ijms20071533. PMID: 30934718

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