prov:value
| - The compounds of the invention of formula (I) can be made by a variety of methods, and some of these are illustrated in Schemes I to V. Throughout these Schemes, the terms X, Y, Z, R1 and R2 are as defined above, R3 is hydrogen or a metal (such as sodium or potassium), R is an alkyl group, and L is a leaving group such as a halide (chloride, bromide or iodide), a CH3 SO4 -anion, or a sulphonyloxy-
|