C[C@]12CC(O)C3C(CCC4=CC(=O)CC[C@@]43C)C1CCC2c1csc(-c2ccccc2)n1
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?