Cc1cc(O)c2cnncc3c(O)cc(C)c4c(=O)oc5c(CO)c(O)c(C(=O)O)c(cnncc6c(C(=O)O)c(O)c(CO)c7oc(=O)c1c2oc67)c5oc34
A rotatable bond is defined as any single non-ring bond, attached to a non-terminal, non-hydrogen atom. How many bonds in the molecule are rotatable?