Table 1.

Major components of peppermint essential oil identified by GC-MS.

Peak NO.	Components	CAS NO.	RT (min)	Area (%)
1	menthol	1490-04-6	11.13	37.01
2	menthone	14073-97-3	10.55	21.83
3	1,8-cineole	470-82-6	7.56	6.36
4	L-menthol acetate	16409-45-3	13.62	5.34
5	(+)-menthone	3391-87-5	10.73	4.71
6	D-menthol	15356-60-2	10.83	3.41
7	β-Caryophyllene	87-44-5	16.61	2.66
8	menthofuran	494-90-6	10.67	2.43
9	(+)-pulegone	89-82-7	12.43	1.94
10	(R)-(+)-limonene	5989-27-5	7.47	1.89
11	β-Cyclopentene	18252-44-3	17.89	1.62
12	β-Pinene	18172-67-3	6.34	1.41
				90.61

CAS No.: Chemical abstracts service registry number; RT: retention time; components with ≥1% of relative content (Area %) are listed.