Containing 17 hydrogen atoms, in the range of 5.17 ~ 5.19ppm is the proton signal of the camphene exocyclic olefin; in the range of 1.01 ~ 1.03ppm is the proton signal of camphene exocyclic methyl group.
There are 17 hydrogen atoms in the range of 5.17-5.19ppm, which is the proton signal of exoalkene of camphene skeleton, and 1.01-1.03ppm, which is the proton signal of exomethyl of camphene skeleton.