| 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%, %, iso-pinocamphone 24.6% | Spain | [3, 41] | Aerial part (blue flowers) | 0.36% | %, %, %, %, % | East Lithuania | [41, 42] | Aerial parts | 0.4% | %, %, %, %, % | India | [41, 43] |
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