Table 2. Quantification of the identified individual phenolic and flavonoid compounds of nipa palm vinegar using an HPLC system.

Identified compound	Quantity (µg/g dry weight)
	AE O-NPV	NPV-P	AE NPV-P
Vanillic acid	42.13 ± 1.56	ND	ND
Catechin	12.92 ± 2.97	1.33 ± 0.24	ND
Rutin	52.00 ± 7.79	1.84 ± 0.87	50.83 ± 7.43
Quercetin	ND	1.59 ± 0.10	ND

Notes.

Each value is presented as the mean ± standard error of the mean.

ND, not detected.