Difucosyllacto-N-neohexaose is an oligosaccharide that can be isolated from human milk[1].
References
[1] Strecker G, et al. Primary structure of four human milk octa-, nona-, and undeca-saccharides established by 1H- and 13C-nuclear magnetic resonance spectroscopy. Carbohydr Res. 1992 Mar 16;226(1):1-14. DOI:10.1016/0008-6215(92)84050-3