Normal Structure of Isotropic Odd Orthogonal Groups

Let $(M,q)$ be a quadratic projective module of an odd rank over an commutative ring, where the form $q$ is semiregular, with global Witt index of at least $2$, and with $\mathrm{r}\mathrm{k}(M)\ge 7$. We prove standard commutator formulae and classify $\mathrm{E}\mathrm{O}$-normal subgroups of $\mathrm{O}(M,q)$ without assumption of $2$ being invertible.