CC1C(=O)OC2CC[N+]3(CC(=O)c4ccc(Br)cc4)CC=C(COC(=O)C(C)(O)C1(C)O)C23.[Br-]
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?