Cc1ccc(S(=O)(=O)NC(C)C(=O)Oc2ccc3c(=O)c(-c4ccc([N+](=O)[O-])cc4)c(C)oc3c2)cc1
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?