CCn1c(=O)c(CCC(=O)NCC2CCCO2)c(C)c2c(C)nn(-c3ccc(C)cc3)c21
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?