The by-products from the dehydration of exo-2-camphanol in the camphor manufacture byhydration process contains two unknown components: A in 14% and B in 15%. The sample mixturecontaining 90% A and B with different mass ratio(ca. 1: 1, 1: 2 and 1: 4) were collected by furtherfine fractional distillation with 60 plate number for spectroscopic characterization. The combined spec-tral results of GC, MS and 13C NMR of the samples revealed that A is exo-2,2,3-trimethylbicyclo[2,2,1 ]heptane (exo-isocamphane) and B is endo-2,2,3-trimethylbicyclo [2,2, 1]heptane (endo-isocom-phane).
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