2-甲氧基烟酸

(4S)-4-乙基-4-羟基-1H-吡喃并[3,4-c]吡啶-3,8(4h,7h)-二酮

(S)-4-ethyl-4-hydroxy-8-methoxy-1H-pyrano[3,4-c]pyridin-3(4H)-one