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(https://www.thevespiary.org/rhodium/Rhodium/pdf/hydride.ketone.reduction-1.pdf)J. Am. Chem. Soc. 78, 2579-2582 (1956) (https://www.thevespiary.org/rhodium/Rhodium/pdf/hydride.ketone.reduction-2.pdf)
(https://www.thevespiary.org/rhodium/Rhodium/pdf/hydride.ketone.reduction-2.pdf)