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VOL. 10, ISSUE 2 (2026)
Volatile constituents of five successive Rhizophora racemosa Leaf extracts G. Mey. (Rhizophoraceae)
Authors
Olufemi A Giwa-Ajeniya, Oladipupo A Lawal
Abstract
The crude extract
isolated from air dried leaves of Rhizophora racemose from ojo riverine using
five different solvents. The leaves were analyzed for their constituents by
GC/MS. Volatile constituents of Hexane extract contained fatty acids (91.58%)
which is the predominant class in Hexane. monoterpene (3.10%) and diterpenes
(3.72%) , 9-octadecenoic acid (49.94%), n-hexadecenoic acid (32.24%) and
octadecanoic acid (6.61%) were the representative fatty acids. The GC-MS
analysis also showed the presence of isoborneol (2.35%), and phytol (2.97%) as
other compounds in amount greater than 1%. Main compounds observed in the
dichloromethane extract consist majorly of hydrocarbon compounds which are
tetratetracontane (18.30%), hexacosene (23.52%), 1-iodo- hexadecane (17.83%)
and tricosane (12.75%). Ethyl acetate fraction on the hand consist majorly
fatty acids (72.07%). A sizeable amount of diterpenes (7.86%), saturated
hydrocarbons (7.56%) and monoterpene hydrocarbons (3.86%) were also present in
the extract. The fatty acids content was represented in higher quantity
n-hexadecanoic acid (39.75%) and oleic acid (25.13%). The diterpene, neophytadiene (7.86%) and a
monoterpene, artemiseole (3.86%) were also present in a sizeable amount.
Acetone extract of R. racemose contain four classes of compounds saturated
hydrocarbons (74.99%), unsaturated hydrocarbons (2.08%), aliphatic alcohols
(13.99%) and fatty acids (7.75%). The compounds identified from the acetone
layer extract were mainly hydrocarbons. The significant compounds which belong
to the hydrocarbon class include tetratetracontane (47.88%), cctacosane
(12.25%), and 11-methyltricosane (7.18%). In addition, octadecanoic acid
(7.75%), a fatty acid was also found in sizeable proportion. The alcohol
contents were represented by 2-hexyl-1-decanol (11.2%) and 2-octyl-1-dodecanol
(2.96%). The methanol extract phytochemical constituents of Rizophora
racemose leaf extract comprised of aliphatic alcohols (11.19%) represented
by 2-octyl-1-dodecanol (8.39%) and 2-hexyl-1-decanol (2.805). The fatty acid
layer had a sizeable amount of octadecanoic acid (10.21%). The hydrocarbon
contents which were detected in significant quantity (54.89% saturated and
7.04% unsaturated) included 9-octyl-docosane (35.29%), 13-undecylpentacosane
(8.14%), hexatriacontane (7.66%) and 7-methyl-3,4-octadiene (4.71%).
Pages:31-36
How to cite this article:
Olufemi A Giwa-Ajeniya, Oladipupo A Lawal "Volatile constituents of five successive <i>Rhizophora racemosa</i> Leaf extracts G. Mey. (Rhizophoraceae)". International Journal of Chemical Science, Vol 10, Issue 2, 2026, Pages 31-36
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