Table 1.

Oligomer precursors of lignins, retention time and their respective m/z obtained by UPLC-MS/MS in internodes of Saccharum species.

Unit	Struture	m/z	Retention Time(min)
Monomers	Sinapylaldehyde Sinapylalcohol	207 209	3.26 2.75
Dímers	G(8-5)G	357	3.39/4.08
	G(8-O-4)G	375	3.76
	S(8-5)G; S(8-8)G	387	3.42 e 3.90
	G(8-O-4)S	405	3.20
Trímers	G(8-O-4)G(8-5)G	553	3.70
	G(8-O-4)S(8-5)G	583	3.57/3.66
	G(8-O-4)S(8-O-4)G	601	3.58
	S(8-O-4)S(8-O-4)G	631	3.65
	S(8-O-4)S(8-8)S	643	3.82/4.20