COc1cc(OC)c(NC(=O)c2ccc3c(c2)N(Cc2ccc(C)cc2)CCS3)cc1Cl
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?