CCCCc1nc2c(c3c1C[C@H](C)OC3)CN(C(=O)Cc1cccc(OC)c1)CC2
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?