| http://www.w3.org/ns/prov#value | - (i) condensing a compound of the formula: ##STR9## wherein R4 is a protecting group and R1 and n are the same as defined above, or a reactive derivative thereof with a compound of the formula: ##STR10## wherein R5 is carboxy or a protected carboxy when R2 is acetoxy or (1-methyl-1H-tetrazol-5-yl)thio; or R5 is --COO- when R2 is a group of the formula: ##STR11## (Y is the same as defined above), or
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