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. Author manuscript; available in PMC: 2014 Jun 24.
Published in final edited form as: Tetrahedron. 2013 Apr 15;69(25):5205–5220. doi: 10.1016/j.tet.2013.04.041

Table 5.

Comparison of 13C NMR shifts of 90–93 against natural armatol A.8

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Position δ 90a δ 91a δ 92a δ 93a δ natural 5a,8
9 34.4 36.8b 34.7 36.8b 34.5
10 73.3 73.4 73.3 73.4 73.4
11 76.3 74.4b 76.3 75.4b 76.1
27 24.0 23.0b 24.3 21.7b 23.9
a

13C NMR data taken in C6D6, referenced to 128.0 ppm.

b

|δ|>0.4 ppm relative to natural 5.