O=C(CCCn1c(=O)c2sccc2n(Cc2cccc(Cl)c2)c1=O)NCc1ccc2c(c1)OCO2
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?