| http://www.w3.org/ns/prov#value | - R1 represents a 4-methoxy-3-chloro-benzenesulfonyl, 4-methoxy-3-methyl-benzenesulfonyl, 4-methoxy-phenylsulfonyl or 4-methoxy-2,3,6-trimethyl-phenylsulfonyl group, R9 represents one of the groups ???(CH2)j???C(O)OR11, ???(CH2)j???R12 or ???(CH2)j???C(O)NH-R11, wherein R11 is a hydrogen atom, or C1???C6 alkyl, C7???C13 aralkyl or C6???C12 aryl, which can optionally be substituted, R12 is one of the
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