(3-Carboxy-3-aminopropyl)dimethylsulfonium 1,5-naphthalenedisulfate 73927-16-9 Methylmethioninnaphthalin-1,5-disulfonat [German] Sulfonium, (3-carboxy-3-aminopropyl)dimethyl-, 1,5-naphthalenedisulfate