13C NMR
With δ = 80 ppm in the 13C NMR spectrum, it indicated
the presence of quarternary carbon of acetylenic group.
13C spectrum of two groups of olefinic carbon were
shown at δ = 120 and 145 ppm. Carbonyl ester group
was indicated at δ = 175 ppm and the carbon of alkyl
groups were shown at δ = 15 - 75 ppm. Coupling atoms
were also confirmed with 1H-1H Cosy spectrums and 1H-
13C HMBC spectrums.9