Table 2.

Examples of the three different fractions of HMOs, showing neutral (fucosylated and nonfucosylated) and acidic compounds.

Neutral Fucosylated HMOs	Neutral Nonfucosylated HMOs	Acidic HMOs
2′-Fucosyllactose (2′-FL)	Lacto-N-biose (LNB)	Disialyllacto-N-tetraose (DSLNT)
3-Fucosyllactose (3-FL)	Lacto-N-tetraose (LNT)	Sialyllacto-N-neo-tetraose b (LST b)
Lacto-N-fucopentaose I (LNFP I)	Lacto-N-neotetraose(LNnT)	Sialyllacto-N-neo-tetraose c (LST c)
Lacto-N-fucopentaose II (LNFP II)	Lacto-N-hexaose (LNH)	Sialyl lacto-N-tetraose a (LST a)
Lacto-N-fucopentaose III (LNFP III)	Lacto-N-neohexaose (LNnH)	3′-Sialyllactose (3′-SL)
Difucosyllactose (DFL)		6′-Sialyllactose (6′-SL)