Atomic structure
There are too many chemically distinct structures (243) corresponding to the specified structure with alternative fragments (<..>), so only one was processed further: 
Ac(1-2)[Ac(1-2)[Ac(1-2)[Ac(1-2)[Ac(1-2)[Ac(1-4)]aDManpN(1-P-6),Ac(1-4)]aDManpN(1-P-6),Ac(1-4)]aDManpN(1-P-6),Ac(1-4)]aDManpN(1-P-6),Ac(1-4)]xDSuga(1-1)Subst // Sug = xDManaN1N; Subst = biotin = SMILES O{1}C(CCCC[C@H]1[C@]([H])([C@]([H])(CS1)N2)NC2=O)=O
There is only one chemically distinct structure for the variant above:
CC(=O)N[C@@H]1[C@@H](OP(=O)(O)OC[C@H]2O[C@H](OP(=O)(O)OC[C@H]3O[C@H](OP(=O)(O)OC[C@H]4O[C@H](OP(=O)(O)O[1*](OC(C)=O)(OC(C)=O)OC(=O)CCCC[C@@H]5SC[C@@H]6NC(=O)N[C@H]56)[C@@H](NC(C)=O)[C@@H](O)[C@@H]4OC(C)=O)[C@@H](NC(C)=O)[C@@H](O)[C@@H]3OC(C)=O)[C@@H](NC(C)=O)[C@@H](O)[C@@H]2OC(C)=O)O[C@H](CO)[C@@H](OC(C)=O)[C@@H]1OR1 = xDSuga, Sug = xDManaN1N
Warning = sub-repeat ending at xXP?: variable unit count (4-9) was assumed to be 4