COc1cc2c(cc1O)[C@H](Cc1ccc(Oc3cc(C[C@@H]4NCCc5cc(OC)c(O)cc54)ccc3O)cc1)NCC2
The donor in a hydrogen bond is usually a strongly electronegative atom such as N, O, or F that is covalently bonded to a hydrogen bond. How many hydrogen bond donors does the molecule have?