s is, or may be produced by a commonly known method, a modification thereof, or the like. [0381] Of Compound (I???), Compound (Ia???), wherein R3 is a hydrogen atom, can also be produced by the method shown by [0382] Reaction Formula E Below. [0383] With respect to the formula above, Xc is a leaving group. [0384] The ???leaving group??? represented by Xc is, for example, the same as the leaving gr