So in this compound we now have six N. So our carbon number is six. We have eight HS, but we also have two BRS and three oxygens. Recall that whenever we see an oxygen or a sulfur, according to rule number two, we do not count them. We omit them in our calculation. But since rule number one states that halogens count as hydrogens, we have not eight, but eight plus two. So ten h atoms.