Phospholipid derivatives of the formula: ##STR1## wherein R.sup.1 is a higher alkyl, acylmethyl or alkylcarbamoyl group which may be substituted by cycloalkyl; R.sup.2 is a lower alkyl which may be substituted by carboxy, formyl or lower acyl, a carbamoyl or thiocarbamoyl group which is substituted by lower alkyl, or an acetoacetyl group; R.sup.3, R.sup.4 and R.sup.5 are independently hydrogen or lower alkyl, or ##STR2## represents a cyclic ammonio group; and n represents an integer of 8 to 14, and salts thereof have antitumor activity.
磷脂衍
生物的
化学式为:##
STR1## 其中 R.sup.1 是较高的烷基、酰
甲基或烷基
氨基甲酰基团,可以被
环烷基取代;R.sup.2 是较低的烷基,可以被羧基、甲酰基或较低酰基、一个被较低烷基取代的
氨基甲酰基或
硫代
氨基甲酰基团,或一个乙酰
乙酰基取代;R.sup.3、R.sup.4 和 R.sup.5 独立地是
氢或较低烷基,或 ##
STR2## 代表一个环状
铵基;n 代表一个整数,范围为 8 到 14,以及其盐具有抗肿瘤活性。