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. Author manuscript; available in PMC: 2018 May 26.
Published in final edited form as: J Nat Prod. 2017 May 2;80(5):1639–1647. doi: 10.1021/acs.jnatprod.7b00247

Table 4.

Calculated Dihedral Angles and J-values for 2a

Dihedral Weighted average dihedral angle Observed J value
H5-C5-C6-H6 −164.3 8.8
H8-C8-C9-H9a −88.6 0
H8-C8-C9-H9b 156.9 8.0
a

See SI for details of calculations.