CCOc1cccc(C2c3c(-c4cc(C)ccc4O)n[nH]c3C(=O)N2Cc2ccco2)c1
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?