常見例句Keywords Helical structure;Optical rotation;Conformation;L (+) 2;3 O Isopropylidene threitol phathalate; 螺旋結構;旋光性;構象;鄰苯二甲酸L-(+)-2;3-O-亞異丙基蘇力糖酯; 返回 threitol