The assignments of the main interunit linkages of KL and the fractions.

Label	δ C/δH	Assignment
Bβ	53.3/3.48	Cβ–Hβ in β–5′ substructures (B)
Cβ	53.5/3.08	Cβ–Hβ in pinoresinol substructures (C)
Aγ	60.0/3.43	Cγ–Hγ in β-O-4′ substructures (A)
Iγ	61.3/4.13	Cγ–Hγ in coniferyl alcohol end groups (I)
Bγ	62.7/3.70	Cγ–Hγ in β–5′ substructures (B)
Cγ	70.7/3.76 and 4.17	Cγ–Hγ in pinoresinol substructures (C)
Cα	84.8/4.63	Cα–Hα in pinoresinol substructures (C)
S′2,6	106.4/7.31	C2,6–H2,6 in oxidized (Cα O) syringyl units (S′)
S2,6	103.8/6.69	C2,6–H2,6 in syringyl units (S)
G2	111.0/7.02	C2–H2 in guaiacyl units (G)
G5	115.1/6.72	C5–H5 in guaiacyl units (G)
G6	119.0/6.77	C6–H6 in guaiacyl units (G)
H2,6	127.9/7.01	C2,6–H2,6 in p-hydroxyphenyl units (H)
pCA2,6	130.0/7.50	C2,6–H2,6 in free p-coumaric acid (pCA)
pCAα/FAα	144.1/7.50	Cα–Hα in free p-coumaric acid (pCA) and ferulic (FA) acids
pCA3,5	115.5/6.79	p-Coumarate
FA2	110.9/7.32	Ferulate
FA6	122.5/7.15	Ferulate