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Principal component analysis (PCA) biplots of the samples and analyzed parameters of ethanolic extracts (axes F1 and F2: 92.24%), where R—rosemary; O—oregano; L—lovage; P—parsley; 1, 2, and 3—sample number according to the extraction procedure (Table 1); TPC—total phenolic content; AA—antioxidant activity; I%—radical-scavenging activity; Et—ethanolic concentration; MP—microwave power; Rep—extraction repetition, T—extraction duration.
