prov:value
| - A C1-C4 alkyl may be, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, iso-butyl or tert-butyl, and a C1-C8 alkyl may additionally be, for example, the various pentyl, hexyl, heptyl, or octyl isomers. [0060] If a substituent is halogen, it is fluorine, chlorine, bromine, or iodine, but especially chlorine or bromine. [0061] If a substituent is C1-C6 alkylene it is, for example,
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