Table 1.

A) Reference compounds identification from feature lists generated without isotope filtering and B) reference compounds identification from feature lists generated with isotope filtering in the NIST leaf extract (SRM 3254)

A.
Standard	Laboratory A	Both	Laboratory B
Caffeic acid	+
Caffeine			+
Chlorogenic acid			+
Coumaric acid		-
Epicatechin		+
Epicatechin gallate		+
Epigallocatechin		+
Gallic acid			+
Gallocatechin		+
Gallocatechin gallate		+
Kaempferol		+
Myricetin		+
Quercetin		+
Rutin		+
Theanine		+
B.
Standard	Laboratory A	Both	Laboratory B
Caffeic acid		-
Caffeine			+
Chlorogenic acid		-
Coumaric acid		-
Epicatechin		+
Epicatechin gallate		+
Epigallocatechin		+
Gallic acid		-
Gallocatechin		+
Gallocatechin gallate		+
Kaempferol	+
Myricetin	+
Quercetin	+
Rutin		+
Theanine		+