Q is hydrogen, hydroxyl or a leaving group. [For purposes of this disclosure, a leaving group is a halogen, an acyloxy group (including a carbonate ester), a succinimidyloxyl or phthalimidyloxy group, an alkoxy or phenoxy or substituted phenoxy group, an imidazolyl group, a benzotriazolyloxy group or any of the other similar activating groups well known to those skilled in the art;]