摘要 |
Antitumoural compounds of general formula (I); wherein Ar is an heterocyclic group of formula (a) and R1, R2, R3, R4, R5, R6, R7, n and the dotted line take permitted meanings can be obtained from a tunicate of the family Polyclinidae, genus Aplidium, species cyaneum, and the invention further provides derivatives thereof.
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