3-(Hydroxymethyl)phenytoin N,N-dimethylaminoethyl carbonate 3-(Hydroxymethyl)phenytoin N,N-dimethylaminoethyl carbonate methanesulfonate 92135-00-7 Carbonic acid, 5,5-diphenyl-3-((phosphonooxy)methyl)-, (SP-4-2)- Hmp opdacm