子冖( Lactose Lactose(B form)[O-B-D-galactopyranosyl-(1-4)-B-D-glucopyranosel CHOH CH,OH HO H -o Ou OH B O OH 3 OH H OH D-吡喃半乳糖基β-1-4-(β)-D-吡喃葡萄糖乳 糖 (Lactose) D-吡喃半乳糖基 -1→4-（）-D-吡喃葡萄糖 -1，4