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(A) 1H NMR COSY spectrum showing the scalar coupling network for the E- and Z-ascladiol isomers. (B) 1H NMR NOESY spectrum showing the dipolar coupling network for the E- and Z-ascladiol isomers. Cross-peaks due to the spatial proximity between CH2(7) and CH2(8) (a) and between CH(6) and CH2(8) (b) are selectively observed for the E and Z isomers, respectively.
