NCCCCNCCCNC(=O)CNC(=O)CC(O)C(N)CCCC(NC(=O)C(CN)NC(=O)C(O)CNC(=O)CC(N)c1ccc(O)cc1)C(=O)O
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?