'H NMR chemical shifts"."

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Context 1

... u r synthetic strategy for the synthesis of 11 involved conversion of diosgenin to 26- hydroxycholesterol (VIII) (Fig. 2), transformation of the A5 double bond of VIII via a A5'7 intermediate to the A8(I4) position, followed by an allylic oxidation at C(15) while maintaining the 25R configuration during each step. The structure and stereochemistry of each synthetic inter- mediate were confirmed by 'H and I3C NMR (Table 1 (Table 3). (35) (32)) of the 3(3,16(3,26-triol were evidently accompanied by similar problems. ...