(3b,5b,12b)-3-[(O-2,6-二脱氧-b-D-核糖-外吡喃酰基-(1-4)-O-2,6-二脱氧-b-D-核糖-外吡喃糖基-(1-4)-2,6-二脱氧-b-D-核糖-外吡喃糖基)氧基]-12,14-二羟基卡-20(22)-烯醇化物-d3