Fresh aerial parts of A. biebersteinii were collected in May and June 2009 at different developmental stages (vegetative, floral budding, flowering and fruit set)from its natural habitat in the Dizin zone, northwest of Tehran, Iran (Latitude: 36° 4′ 52″N, Longitude: 51° 22′ 46″ E, Altitude: 2325-2425 m).

All oil samples from different plant parts and phenological stages were mostly made up of monoterpenoid compounds (88.6 - 99.6%), especially oxygenated ones (52.4 - 82.4%). The oil of the vegetative stage contained high amounts of limonene, 4a-alpha,7-alpha,7a-alpha-nepetalactone, p-cymene and 1,8-cineole. The major constituents in the flower budding stage oil were found to be limonene, 1,8-cineole and 4aalpha-7beta-7aalpha-nepetalactone. In the oil of the fruit set stage, gamma-terpinene, p-cymene and cis-chrysanthenyl acetate were the predominant constituents. On the other hand, the most important compounds from the stem oil were 4a-alpha,7-alpha,7a-alpha-nepetalactone, 1,8-cineole, 4aalpha-7beta-7aalpha-nepetalactone and camphor. 4aalpha-7alpha-7aalpha-nepetalactone, limonene, 1,8-cineole and cis-p-menth-2-en-1-ol were found in high concentration in the oil of leaves, whereas 4aalpha-7alpha-7aalpha-nepetalactone, 4aalpha-7beta-7aalpha-nepetalactone, limonene and p-cymene were present in large amounts in the oil of flowers.