Table 3.

Quantification of 1–6 year-old bamboo lignin samples by quantitative 2D-HSQC NMR.

	1	2	3	4	5	6
S/G ratio	1.94	1.69	2.25	2.48	3.02	2.92
β-O-4 ether units (%)	84.13	86.85	89.85	92.04	92.95	89.15
Resinol substructures(B) (%)	4.37	4.13	2.54	1.81	1.15	2.02
Phenylcoumaran(C) (%)	1.19	1.45	0.57	0.39	0.28	0.36