Functional groups in FF-CP-FF and in samples hydrogenated over Pd/C at different temperatures, as determined by ¹³C NMR analysis.

	C O (%)	C C (%)	C–O (%)	C–C (%)
FF-CP-FF	6.8	80.1	0	13.1
Hydrogenation at 150 °C	1.9	0.8	26.3	72.2
Hydrogenation at 250 °C	0	0	17.2	82.6
Hydrogenation at 300 °C	0	0	3.5	96.6