## 3 Discussion
[PERSON] et al. [26] observed the highest extraction of TP using 50% (\(v/v\)) water-methanol, ethanol, and acetone for _Saptarangi_ (_S. chinensis_ L.). The authors revealed that 50% acetone extract had high levels of bioactive compounds (TPC 555 mg GAE g\({}^{-1}\) CRE compared to that of 50% methanol and ethanol), thus confirming that 50% acetone was the most efficient solvent than ethanol. In addition, [PERSON] et al. [23] reported the highest TPs from _Bucida buceras_ extracted using pure acetone extraction solvent and the highest TPs from _Phoradendron californicum_ using water and pure methanol. The differences observed could be owed to the solubility and selectivity of plant compounds by solvents regardless of their similarity of the solvent's polarity index. The antioxidant capacity of _H. odoratissimum_ extracts was significantly more affected than that of _H. patulum_ by the extraction solvents. Results in the current study were supported by various studies who reported the influence of extraction solvents and discrepancy on the chemical profiles among plant species on the antioxidant capacity of different plants of the same genus. Even though the two species were obtained from the same agro-climatic zones, the differences observed in their antioxidant capacity could be influenced by a couple of factors (i.e., variability in the chemical composition of each plant species, selectivity of solvents, and the solubility of plant chemical compounds), which affects extraction yield [1; 23; 27]. A direct correlation was again confirmed in a study by [PERSON] et al. [28]. The authors investigated the correlation between the extraction yield of _mangiferin_ to the antioxidant activity, total phenolic, and total flavonoid content of _Phuleria marcocarp_ fruits, and a significant (\(p\leq 0.05\)) correlation between the extraction solvent (methanol), method, extraction yield of mangiferin, and DPPH scavenging capacity was observed. In addition, [PERSON] [29] investigated the chemical profile of EOs obtained from _H. patulum_; the author reported on high antioxidant activity of the oils, which is allied to the presence of the phenolic constituent, arbutin. An earlier study by [PERSON] et al. [30] also reported weak antioxidant activity of arbutin. The authors, however, further discussed that the potency of the antioxidant of the compound to be directly dependent on the type of assay employed. Furthermore, there are several studies that showed the strong correlation between DPPH and TP content, which could explain the higher DPPH scavenging ability of _H. odoratissimum_ than _H. patulum_. For instance, the results of this study indicated a significant (\(p\leq 0.05\)) correlation between the total polyphenol content and the DPPH scavenging capacity of the extracts (Table 1). The GC-MS analysis of this study identified higher concentrations of alkane hydrocarbons (tetradcane and hexadecane) in the _H. odoratissimum_ extracts. These could be responsible for the higher antioxidant activity that was obtained in the _H. odoratissimum_ extracts than _H. patulum_ extracts. This could be supported by the findings of [PERSON] et al. [31]. The authors compared chemical composition, antioxidant, and antimicrobial activities of EOs obtained from different parts (leaves and stems) of _Daplane mucronata_ [PERSON]. Their study reported a significantly high antioxidant activity in the EOs obtained from the leaves than that of the stems and linked this to alkane hydrocarbons. Pentadecane (12.75%), 2-methyl hexadecane (8.90%), 7,9-dimethyl hexadecane (8.90%), tetradcane (7.32%), 5-Propyl decane (6.16%), 2,3,5,8 tetramethyl hexadecane (5.81%), 2-methyl6-propyl dodecane (5.11%), and 5-methyl tetradcane (5.10%) were identified as the major constituents of the potent plant part. Generally, most of these compounds are reported to exhibit high antioxidant and high microbial effects [32]. In this study, the concentration of alkylbenzene and aromatic hydrocarbons were below the detected limit for ethanol extracts of both _H. patulum_ and _H.