COC1=C(C)C(=O)O[C@]12C(=O)C(C)=C1CCCCN3[C@H]([C@@H]4C[C@H](C)C(=O)O4)CC[C@]132
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?