Nuclear magnetic resonance spectroscopy.  13 C Fourier transform spectra of   8 - and   9 -tetrahydrocannabinol.
D002188:Cannabis; D002247:Carbon Isotopes; D013759:Dronabinol; D005583:Fourier Analysis; D009682:Magnetic Resonance Spectroscopy
D002247:Carbon Isotopes; D013759:Dronabinol