abstract |
A compound of the formula wherein R4 is a phenyl substituted one or more times independently by fluorine, SR5, SOR5, or halo-substituted C1-4 alkyl; R5 is hydrogen, C1-4 alkyl, C2-4 alkenyl, C2-4 alkynyl or NR7R17, excluding the moities SR5 being SNR7R17 and SOR5 being SOH; R7 and R17 is each independently selected from hydrogen or C1-4 alkyl or R7 and R17 together with the nitrogen to which they are attached form a heterocyclic ring of 5 to 7 members which ring optionally contains an additional heteroatom selected from oxygen, sulfur or NR15; R10 is hydrogen or C1-4 alkyl; R15 is R10 or C(Z)- C1-4 alkyl; Z is oxygen or sulfur. |