Allyl β-lactoside (Allyl β-D-lactose) is a lactoside, which can be generated by incubating lactose and allyl alcohol with cellulase preparation, and can be used as a starting material for the synthesis of glycopolymers[1].
References
[1] Yasutake N, et al., Efficient synthesis of glyceroyl beta-lactoside and its derivatives through a condensation reaction by cellulase. Biochim Biophys Acta. 2003 Mar 17;1620(1-3):252-8. DOI:10.1016/s0304-4165(03)00004-7