Cc1c2c(c(O)c3c(O)cccc13)C(=O)C1(O)C(=O)C(C(=O)NCNc3ccc(C(N)=O)cn3)=C(O)C(N(C)C)C1C2.Cl
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?