1H nuclear magnetic resonance-based metabolite profiling of guava leaf extract: an attempt to develop a prototype for standardization of plant extracts

Table 2 LC-MS/MS data for the representative guava extracts^a

Extract	Compound	Presence	Retention time (mins)	Mass/charge M/z	Collision energy
WB	Quercetin	✓	14.257	303 (M + H)⁺	25
	Ferulic acid
	Gallic acid	✓	8.28	170.70 (M + H)⁺	35
WC	Quercetin	✓	13.91	302.35 (M + H)⁺	35
	Ferulic acid	✓	6.4	195.20 (M + H)⁺	35
	Gallic acid	✓	8.28	170.55(M + H)⁺	15
WD	Quercetin	✓	14.15	302.95 (M + H)⁺	35
	Ferulic acid	✓	6.4	195.15 (M + H)⁺	15
	Gallic acid
RD	Quercetin	✓	14.15	303.10 (M + H)⁺	35
	Ferulic acid	✓	6.4	195.05 (M + H)⁺	25
	Gallic acid	✓	8.28	170.10 (M + H)⁺	15
DaD	Quercetin	✓	14.257	302.70 (M + H)⁺	35
	Ferulic acid
	Gallic acid	✓	8.28	170.10 (M + H)⁺	35

Key:
✓ Present
WB, WC, WD - representatives for seasonal differentiation
WD, RD, DaD - representatives for regional differentiation
W – Leaves collected from region Shirwal; R - Leaves collected from region Rahata; Da - Leaves collected from region Dapoli
B - collection season May 2013; C – collection season October 2013; D – collection season March 2014
^aThe fragmentation patterns have been provided as Supplementary data

ISSN: 2662-7671