Figure 2

Experimental detection the absorption spectral lines of methyl butyronitrile (C₂H₅CHCNCH₃) near the frequency f_c1 = 145.6832 GHz and glycine conformer II (H₂NCH₂COOH) near the frequency f_c2 = 145.6864 GHz detected in the sample of patient 2 before (red) and after chemotherapy (blue), together with the corresponding reference measurement for healthy volunteer 1 (green). There are two close lines differing by less than tens of Hz for methyl butyronitrile, given in the databases^31,32 at the frequency fc = 145.6833846 GHz, characterized by Lg I = − 4.9041 and quantum numbers (v = 0) 64 54 10 ← 64 53 11 and (v = 0) 64 54 11 ← 64 53 12. For glycine conformer II, there is only one line at the central frequency fc = 145.6860831 GHz, characterized by Lg I = − 3.1037 and quantum numbers 21 4 18 ← 20 4 17 in the databases^31,32.