Table 1.

The structures of the eight Δ-disaccharide standards from HP/HS

Reference number	Disaccharide	Formulas	R2	R6	R
1	TriS	ΔUA(2S)-GlcNS(6S)	SO3−	SO3−	SO3−
2	2S6S	ΔUA(2S)-GlcNAc(6S)	SO3−	SO3−	Ac
3	2SNS	ΔUA(2S)-GlcNS	SO3−	H	SO3−
4	NS6S	ΔUA-GlcNS(6S)	H	SO3−	SO3−
5	2S	ΔUA(2S)-GlcNAc	SO3−	H	Ac
6	6S	ΔUA-GlcNAc(6S)	H	SO3−	Ac
7	NS	ΔUA-GlcNS	H	H	SO3−
8	0S	ΔUA-GlcNAc	H	H	Ac