C[C@]12CCC(O)CC1CCC1C2CC[C@]2(C)C(c3cc(C(F)(F)F)[nH]n3)CCC12
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?