## 3 Results and Discussion
### Flavonols
#### 3.5.3 Phenolic Acids  
They are widely distributed secondary aromatic plant compounds with potential health benefits. In our research, 25 phenolic acids were identified using LC-ESI-QTOF-MS/MS. Phenolic substances are classified as phenolic acids if they contain a carboxyl group. In-depth research has been conducted on the phenolic acids' antioxidant, anti-bacterial, anti-antimancry and cardiovascular qualities. Both herbs and spices contain phenolic acid species. This study discovered the two phenolic acid subclasses, hydroxybenzoic acids (11) and hydroxycinnamic acids (14) [74]. Hydroxybenzoic Acids  
In the present work, we characterized ten hydroxybenzoic acids. Compound **31** (gallic acid 4-\(O\)-glucose) was characterized in negative mode at \(m/z\) 331.0666 in mint, fenugreek, basil leaves, and coriander seeds [75]. [PERSON] et al. [76] also mentioned this compound, gallic acid, in their study [76]. Compounds **32** (gallic acid, C\({}_{7}\)H\({}_{6}\)O\({}_{5}\)) and **40** (\(p\)-hydroxybenzoic acid, C\({}_{7}\)H\({}_{6}\)O\({}_{3}\)) with [M\(-\)H]\({}^{-}\) at \(m/z\) 169.0144 and 137.0242, respectively, were commonly identified in basil, mint, fenugreek leaves, fennel, and coriander seeds. Gallic acid is one of nature's most pervasive phytochemicals with strong anti-cancer, anti-allergic, anti-inflammatory, anti-asthmatic, anti-mutagenic, and neuroprotective prop erties [77]. Compounds **33** (\(m/z\) 197.0459) and **36** (\(m/z\) 153.0197) were discovered as syringic acid and protocatechuric acid [78] found commonly in fennel seeds, fenugreek leaves, mint, and basil leaves. Syrringic acid is considered to be a phenolic acid that occurs naturally in fruits, vegetables, and herbs like grapes, strawberries, walnuts, and rosemary. It has potential health benefits, including antioxidant and anti-inflammatory properties, and may improve heart health via lowering blood pressure, minimizing the danger of blood clots, and enhancing lipids levels [79]. Syrringic acid may also have anti-cancer, anti-bacterial, and antiviral effects and has the potential as a natural food preservative [80]. Two more compounds, **34** and **35**, were characterized at \(m/z\) 315.0727, 183.0292, which were tentatively detected as protocatechuric acid 4-O-glucoside and 3-O-methylgallic acid in the negative mode in basil, mint, and fenugreek leaves. In contrast, compound **38** (ellagic acid, C\({}_{14}\)H\({}_{6}\)O\({}_{8}\)) was identified in fennel seeds, basil, and mint leaves with [M\(-\)H]\({}^{-}\) at \(m/z\) 300.9977. It possesses various potent health advantages, for instance, anti-cancerous, anti-inflammatory, antioxidant, anti-aging, antimicrobial, antiulcerogenic, and anti-depressant qualities [81]. Additionally, it has cardio-protective and neuro-protective properties. Some research suggests that ellagic acid may enhance insulin sensitivity and assist in controlling blood sugar levels, potentially benefiting people with diabetes or those at risk of developing the disease. Compound **37** (\(m/z\) 299.0786--4-hydroxybenzoic acid 4-O-glucose) was identified in coriander seeds and fenugreek basil leaves. Compound **40** (valoneic acid dilatone, C\({}_{21}\)H\({}_{10}\)O\({}_{13}\)) was identified in the negative mode at \(m/z\) 469.0052 and found only in mint leaves. It has potential health benefits, for instance, anti-inflammatory effects, antioxidant activity and antimicrobial properties [82]. Valoneic acid dilatone has been studied for its potential to prevent cellular damage and chronic diseases like cancer, diabetes, and heart disease. It may have hepatoprotective effects via lowering oxidative stress and inflammation in the liver, which can help to prevent liver injury and disease [83]. Hydroxylcinamic Acids  
In this study, compounds **42**-**55** belong to the class of hydroxybenzoic acids. Compound **42** was tentatively identified as fertile acid predominantly found in fennel and coriander seeds, basil, fenugreek, and mint leaves.