CN(C)CCN[C@H]1CCC2C3CC=C4C[C@@H](O)CC[C@]4(C)C3CC[C@@]21C
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?