TABLE II.

Lactose and neutral non-fucosylated HMOS that can serve as the core structures for other HMOS.^{28, 32–34}

Core #	Lactose and HMOS core structures	Abbreviations	Symbols	Ref.
I	Lactose (not considered an HMOS itself)	Lac		49
II	Lacto-N-tetraose	LNT		24
III	Lacto-N-neotetraose	LNnT		50
IV	Lacto-N-hexaose	LNH		51
V	Lacto-N-neohexaose	LNnH		52
VI	para-Lacto-N-hexaose	pLNH		53
VII	para-Lacto-N-neohexaose	pLNnH		53
VIII	Lacto-N-octaose	LNO		54
IX	Lacto-N-neooctaose	LNnO		54
X	iso-Lacto-N-octaose	iLNO		55
XI	para-Lacto-N-octaose	pLNO		56
XII	para-Lacto-N-neooctaose	pLNnO		57
XIII	Lacto-N-decaose	LND		58
XIV	Lacto-N-neodecaose	LNnD		58
XV				33
XVI				59

Symbols and abbreviations: galactose (Gal), N-acetylglucosamine (GlcNAc), glucose (Glc).