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. 2021 Sep 10;12:5365. doi: 10.1038/s41467-021-25702-4

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© The Author(s) 2021

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Fig. 4 — The standard procedure is as shown in Table 1. Isolated yields are reported. ^a48 h. ^bNaH as base. Unreacted hydroxyl groups are marked in green. rr regioselectivity ratio.