Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:A second flavonol-type compound that was identified by comparison to the proposed fragmentation pattern in the literature, was kaempferol-3-O-glucoside (Schmidt et al., 2010) (41, M = 448.
Category: