| http://www.w3.org/ns/prov#value | - entional methods to yield a 5-aroyl-2,3-dihydro-1H-pyrrolizine-1-carboxylicacid.U.S. Pat. No. 4,874,871 (also to Syntex (U.S.A.) Inc.) discloses a method of preparing 2,3-dihydro-1H-pyrrolizine-1-carboxylic acid and related compounds from pyrrole in the following manner: ##STR3##where X and X' are independently halogen;Y is --OH; --OM.sup.- M.sup.+, wherein M is an alkali metal; or --NRR' (where R
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