6-脱氧-alpha-L-吡喃半乳糖基-(1->3)-[6-脱氧-alpha-L-吡喃半乳糖基-(1->2)-[alpha-D-吡喃半乳糖基-(1->3)]-beta-D-吡喃半乳糖基-(1->4)]-D-吡喃葡萄糖
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