"59.13" . "-2" . "[(2R)-2,3-bis(butanoyloxy)propoxy]dihydroxyphosphonous acid" . "19.62" . "41.35" . "ChemAxon" . "1" . "161.23" . "2" . "9.66" . "10.06" . "83.55" . "4" . "1.53" . "camptothecin" . "170.2918" .