常见例句Keywords Helical structure;Optical rotation;Conformation;L (+) 2;3 O Isopropylidene threitol phathalate; 螺鏇結搆;鏇光性;搆象;鄰苯二甲酸L-(+)-2;3-O-亞異丙基囌力糖酯; 返回 threitol