Figure 3
From: Niacin, alkaloids and (poly)phenolic compounds in the most widespread Italian capsule-brewed coffees
Loading plot (A) and score plot (B) obtained from the PCA with varimax of the considered bioactive compounds and capsule espresso coffees. Legend: n-CQA: n-O-caffeoylquinic acid; CSAn: caffeoylshikimic acid isomer; CQLn: caffeoylquinic lactone isomer; n-CouQA: n-O-coumaroylquinic acid; n-FQA: n-O-feruloylquinic acid; n-FQL: n-O-feruloylquinic lactone; NMP: N-methylpyridinium.
