| 摘要 |
This invention provides a compound having the formula (see formula) wherein X is phenyl which is optionally substituted; R and R1 are each, independently, hydrogen, halogen, alkyl, alkoxy, hydroxy, or trifluoromethyl; R2 is hydrogen, alkyl, alkoxy, hydroxy, trifluoromethyl; Y is a radical selected from the group consisting of (see formula) R3 is independently hydrogen, alkyl, carboxy, carboalkoxy, phenyl, or carboalkyl; n=2-4; or a pharmaceutically acceptable salt thereof, with the proviso that each R3 of Y may be the same or different which are useful as antineoplastic agents.
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