Table 2.

Volatile compounds present in swab samples from baboon vaginal odour secretions identified tentatively using the ChemStation (Agilent Technologies) and NIST (version MSD F.01.01.2317) mass spectral databases, listed in order of retention time.

Retention time (min)	Molecular weight (Da)	Compound	Primate species with same compound having semiochemical role
2.93	100.089	Methyl isobutyl ketone	Aye-aye, red-ruffed lemur
3.01	93.991	Disulfide, dimethyl-	Humans
3.08	104.084	2-Propanol, 1-ethoxy-
3.23	88.052	Propanoic acid, 2-methyl-
3.34	92.063	Toluene	Ring-tailed lemur, mandrill
3.78	88.052	Butyric acid	Common marmoset, humans
3.94	100.089	Hexanal	Aye-aye, red-ruffed lemur, ring-tailed lemur
5.38	270.256	Hexadecanoic acid, 2-methyl-
5.39	106.078	Benzene, ethyl-	Red-ruffed lemur, mandrill
5.60	106.078	m-Xylene	Ring-tailed lemur, mandrill
6.20	104.063	Styrene	Owl monkey
6.70 to 7.50a	151.063	Oxime-, methoxy-phenyl-	Humans
7.23	120.094	Benzene, (1-methylethyl)-	Ring-tailed lemur, mandrill
8.16	120.094	Benzene, propyl-	Ring-tailed lemur, mandrill
8.36	106.042	Benzaldehyde	Aye-aye, red-ruffed lemur, common marmoset, emperor tamarin, Weddell’s saddleback tamarin, capuchin monkey, owl monkey, mandrill
9.10	128.120	1-Octen-3-ol	Ring-tailed lemur, Coquerel’s sifaka
9.20	94.042	Phenol	Aye-aye, red-ruffed lemur, hamadryas baboon, mandrill
9.40	170.203	Heptane, 2,2,4,6,6-pentamethyl-	Ring-tailed lemur, mandrill
10.74	136.125	D-Limonene	Red-ruffed lemur
12.45	108.058	p-Cresol	Red-ruffed lemur, capuchin monkey
15.84	122.037	Benzoic acid	Coquerel’s sifaka, common marmoset
16.53	154.136	α-Terpineol	Red-ruffed lemur
16.88	152.120	2-Cyclohexen-1-ol, 3-methyl-6-(1-methylethenyl)-
17.52	152.120	cis-Carveol
20.03	117.058	Indole

The compounds in bold font were found with highest abundance and most change from sample to sample.

^aPeak overloading resulting in broad peak and RT variation.