Table 2.

Principal bioactive compounds of Hyssopus essential oil.

Plant material	Essential oil yield	Principal component of essential oil	Region	Reference
Air-dried aerial parts	1.2%	Cis-pinocamphone (21.59%), trans-pinocamphone (7.93%), elemol (7.12%), bicyclogermacrene (6.58%), germacrene D (6.52%), limonene (6.36%), β-pinene (5.20%), trans-caryophyllene (4.65%)	Iran	[40]
Aerial parts	0.18%	Myrtenyl acetate (74.08%), camphor (6.76%), germacrene (3.39%), spathulenol (2.14%), caryophyllene oxide (2.13%), β-caryophyllene (2.10%), cis- sabinol (1.75%), β-bourbonene (1.47%), bornyl acetate (1.42%)	Iran	[39]
Fresh aerial part (stem with inflorescence)	0.47%	Pinocamphone 19.8%, β − pinene ≤ 20.5%, iso-pinocamphone 24.6%	Spain	[3, 41]
Aerial part (blue flowers)	0.36%	Hedycaryol ≤ 9.1%, germacrene D ≤ 5.5%, β − pinene ≤ 11.4%, isopinocamphone ≤ 33.6%, pinocarvone ≤ 28.1%	East Lithuania	[41, 42]
Aerial parts	0.4%	Limonene ≤ 9.8%, germacrene D ≤ 11.3%, 1, 8 − cineole ≤ 11.9%, pinocamphone ≤ 64.9%, β − pinene ≤ 32.4%	India	[41, 43]