prov:value
| - e, or the like; ???SO3M (M is, for example, a hydrogen, an alkaline metal such as Na, Li, K, or the like, an ammonia, an organic amine, or the like); ???NR3 wherein, R is H, alkyl, phenyl, or the like; NR4X wherein, R is H, alkyl, phenyl, or the like, and X is a halogen, a sulfate radical, acidic anions such as a carboxylic acid, BF4, or the like.
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