CC1(C)C2CCC1(CS(=O)(=O)[O-])C(=O)C2.CC1=C[P+](Cc2ccccc2)(c2ccccc2)CC1
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. Amide C-N bonds are not counted because of their high barrier to rotation.  How many rotatable bonds does the molecule have?