CCCCn1c(N)c(N(CC(C)C)C(=O)C2CCN(S(=O)(=O)c3ccc(C)cc3)CC2)c(=O)[nH]c1=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?