丝拉克肽是一种化学物质，化学式是C207H308N56O58S。L-SERYL-L-TYROSYL-L-SERYL-L-METHIONYL-L-ALPHA-GLUTAMYL-L-HISTIDYL-L-PHENYLALANYL-L-ARGINYL-L-TRYPTOPHYLGLYCYL-L-LYSYL-L-PROLYL-L-VALYLGLYCYL-L-LYSYL-L-LYSYL-L-ARGINYL-L-ARGINYL-L-PROLYL-L-VALYL-L-LYSYL-L-VALYL-L-TYROSYL-L-PROLYL-L-ASPARAGINYLGLYCYL-L-ALANYL-L-ALPHA-GLUTAMYL-L-ALPHA-ASPARTYL-L-ALPHA-GLUTAMYL-L-SERYL-L-ALANYL-L-ALPHA-GLUTAMYL-L-ALANYL-L-PHENYLALANYL-L-PROLYL-L-LEUCYL-L-ALPHA-GLUTAMYL-L-PHENYLALANINE;