serotonin + butanoyl-CoA <=> N-butanoylserotonin + CoA + H(+)
serotonin + butanoyl-coa <=> n-butanoylserotonin + coa + h(+)
serotonin + butanoyl-CoA <=> N-butanoylserotonin + CoA + H(+)
serotonin + butanoyl-coa <=> n-butanoylserotonin + coa + h(+)