| http://www.w3.org/ns/prov#value | - phenyl; R2 is H, CH2OH, phenyl, cyclohexyl, cyclopentyl or thiophenyl; R3 IS N+R5R6R7 or a five or six-membered ring heterocycle containing at least one N+R5R6 group, or R5 or R6 is part of a ring as in R4 is H or OH; each of R5, R6, R7 is methyl, ethyl, isopropyl or fluoroethyl; X??? is a cation, e.g. bromide or another halide, or methyl sulphate.
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