Arnaldo Iran R. Luz

Constituents of the essential oil of Piper aduncum L. growing wild in the Amazon region

The essential oils of eight samples of Piper aduncum L., collected at different localities of the Amazon region, were analysed by GC–MS. The major component identified in all samples was dillapiole (31.5–97.3%). Sample A, collected at Serra do Navio (AP), showed a yield of oil and dillapiole content of 3.3% and 31.5%, respectively; sample B, collected at Melgaco (PA), 1.8% and 50.8%; sample C, collected at Benfica (PA), 1.6% and 56.3%; samples D and E, collected at Belem (PA), 1.2% and 82.2%; 1.5% and 86.9%, respectively; sample F, collected at Manaus (AM), 3.4% and 91.1%; sample G, collected at Road Manaus-Caracarai, km 30 (AM), 3.0% and 97.3%; sample H, collected at Cruzeiro do Sul (AC), 3.2% and 88.1%. The yield of oil and dillapiole content of samples of P. aduncum occurring in Malaysia and Fiji showed 1.3% and 64.5%; and 0.5% and 58.0%, respectively. By comparison, the plants growing wild in Amazonas State had the highest oil yield and dillapiole content.

The essential oils of Lantana camara L. occurring in North Brazil

The essential oils of aerial parts of three samples of Lantana camara L. collected at different places in the Amazon Region were obtained by hydrodistillation and analysed by GC–MS. The main constituents found in the oil of leaves and thin branches of a specimen collect in the State of Amapa (sample A) were limonene (16.5%), α-phellandrene (16.4%), germacrene-D (13.2%), β-caryophyllene (10.8%) and sabinene (8.9%). The major components identified in the oil of leaves and thin branches of a specimen collected in the State of Roraima (sample B) were germacrene-D (28.4%), germacrene-B (9.1%) and β-caryophyllene (5.6%). The specimen collected in the State of Para (sample C) furnished oils from leaves plus thin branches and flowers, separately. Both were dominated by γ-curcumene+ar-curcumene (27.6%; 31.9%), α-zingiberene (19.2%; 15.5%) and α-humulene (10.7%; 9.5%), respectively. Copyright

Essential oils composition of Eupatorium species growing wild in the Amazon

The essential oils of six Eupatorium species were obtained by hydrodistillation and analysed by GC-MS. The oil of E. macrophyllum was rich in sabinene (46.7%) and limonene (23.3%). The oil of E. laevigatum was mainly constituted by a mixture of aristolone+laevigatin (23.6%), globulol (16.2%) and germacrene D (8.6%). The principal constituents of the oils of the chemotypes A and B of E. squalidum, E. amygdalinum and E. conyzoides were caryophyllene oxide (17.4–30.1%), globulol (25.1%), germacrene D (10.4–21.6%), spathulenol (14.2%) and β-caryophyllene (7.1–12.3%). The oils of the chemotypes A and B of E. marginatum were dominated by α-zingiberene (57.5%), α-gurjunene (19.5%), germacrene D (14.8%), (E)-8-bisabolene (9.7%) and α-selinene (9.0%).

Sesquiterpenes of Amazonian Piper species

The essential oils from leaves and thin branches of Piper amapense, Piper ducket and Piper bartlingianum were analysed by GC/MS and all volatile compounds were identified as sesquiterpenes. The main constitutents identified in the oil of P. amapense were trans-caryophyllene (25.0%), caryophyllene oxide (17.0%) and β-selinene (15.0%). The oil of P. duckei was dominated by trans-caryophyllene (23.5%), caryophyllene oxide (18.4%), β-eudesmol (9.4%) and a-eudesmol (9.1%). The major components found in the oil of P. bartlingianum were <x-cadinol (11.2%), p-elemene (10.5%), ą-muurolol (9.4%), (E)-nerolidol (9.0%).

Volatile Constituents from Leaves and Stems of Protium heptaphyllum (Aubl.) March.

ABSTRACT The essential oils from the leaves and stems of Protium heptaphyllum were analyzed by GC/MS. The major volatile constituents obtained from the leaves were terpinolene (15.45%), β-elemene (22.09%) and β-caryophyllene (11.11%), while the main component of the stem oil was terpinolene (40.28%).

Volatile Constituents of Brazilian Piperaceae. Part 4. Essential Oil Composition of Piper dactylostigmum, P. plurinervosum and P. vitaceum

Abstract The essential oils of Piper dactylostigmum Yuncker, P. plurinervosum Yuncker and P. vitaceum Yuncker collected at Amazonas State, Brazil, were steam distillated and analyzed by GC/MS. The volatile composition of the oil of P. dactylostigmum was constituted only of sesquiterpenes where α-cadinol (21.7%) was the most abundant. The oil of P. plurinervosum was dominated by 1,8-cineole (31.6%). The main components identified in the oil of P. vitaceum were limonene (33.2%), p-cymene (12.8%) and (E)-nerolidol (20.6%).

The essential oils of Piper reticulatum L. and P.crassinervium H. B. K

Os oleos essenciais das folhas e galhos finos de Piper reticulatum e de P. crassinervium, coletados na regiao norte do Brasil, foram obtidos por arraste a vapor e analisados atraves de GC/MS. O oleo de P. reticulatum e constituido principalmente por β-elemeno (24,6%) e β-cariofileno (16,7%). Os principais compostos identificados no oleo de P. crassinervium foramβ-cariofileno (17,7%), γ-elemeno (14,4%) e β-elemeno (10,9%).

Volatile constituents of the resins from Protium subserratum (Engl.)Engl. and Tetragastris panamensis (Engl.) Kuntz

Abstract The hexane extracts of resins from Protium subserratum and Tetragastris panamensis were analyzed by GC/MS. The main constituents found in the extract obtained from the resin of P. subserratum were β-phellandrene (56.3%) and α-phellandrene (20.8%). The most abundant components identified in the extract obtained from the resin of T. panamensis were β-caryophyllene (27.5%) and α-pinene (6.7%).

Essential oils of some amazonian Mikania species

Abstract Terpenoid constituents were identified in the essential oils of Mikania banisteriae and M. congesta. M. amara contains aliphatic alcohols, aldehydes and acids besides p -cymene and thymol.

Essential Oil of Eugenia punicifolia (HBK) DC.

Abstract The essential oil of the leaves of Eugenia punicifolia collected at two different locations of Amazon have been examined by GC and GC/MS. Both essential oils are dominated by mono- and sesquiterpenes in low percentage. The chief constituent was β-caryophyllene (23.6–32.9%).