CC1(C)CCC(C)(C)c2c1ccc(O)c2Cc1c(O)ccc2c1C(C)(C)CCC2(C)C
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?