| http://www.w3.org/ns/prov#value | - e hydrogen, and R2 is hydrogen, or R1 is a group of the formula IIb, in which X5 is a methyl group, X6 is the common bond with the methine group of the formula I, X7 is a group of the formula --CH???C(OCH3)--CH???CH--X10, X8 together with X10 are a bond, Y is a nitrogen atom and X9 is p-chlorobenzoyl and R2 is hydrogen and R3, R4 and R5 are as just defined above, and to the use of these compounds
|
