81788-49-0 Enkephalin-met, tyr-O-sulfate Enkephalin-met, tyrosine-O-sulfate- L-Methionine, N-(N-(N-(N-(O-sulfo-L-tyrosyl)glycyl)glycyl)-L-phenylalanyl)- METOS Met-enkephalin, tyr-O-sulfate- Methionine-enkephalin, tyr-O-sulfate- Tyr-O-sulfate-met-enkephalin