Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response).

The percentage of "on" time without dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response).

The percentage of "on" time without dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "on" time from baseline to measured time point.

The percentage of "on" time with dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "on" time from baseline to measured time point.

The percentage of "on" time with dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "on" time from baseline to measured time point.

The percentage of "on" time with or without dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "on" time from baseline to measured time point.

The percentage of "on" time with or without dyskinesia was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "off" time from baseline to measured time point.

The percentage of "off" time was assessed using the modified intent-to-treat (MITT) population.

Improvement in motor complications associated with Parkinson's disease are measured as "on" (good medication response); OR "on with dyskinesia" (good medication response, but with superimposed involuntary movements that interfere with activities), OR "off" (poor medication response). Negative values indicate a decrease in "off" time from baseline to measured time point.

The percentage of "off" time was assessed using the modified intent-to-treat (MITT) population.

The Abnormal Involuntary Movement Scale (AIMS) is an assessment of dyskinesia in patients with movement disorders. The AIMS was originally developed to assess neuroleptic-induced extrapyramidal symptoms but has also been applied to the assessment of dyskinesia in patients with Parkinson's disease. AIMS questions 1 to 7 rate the degree of dyskinesia on a 0 to 4 scale in the extremities, trunk, and face, where 0 is no dyskinesia (better outcome) and 4 is severe dyskinesia (worse outcome). The total score range is 0 (better outcome) to 28 (worse outcome). Higher scores indicate a worse outcome.

The average abnormal involuntary movement scale was assessed using the modified intent-to-treat (MITT) population.

The Abnormal Involuntary Movement Scale (AIMS) is an assessment of dyskinesia in patients with movement disorders. The AIMS was originally developed to assess neuroleptic-induced extrapyramidal symptoms but has also been applied to the assessment of dyskinesia in patients with Parkinson's disease. AIMS questions 1 to 7 rate the degree of dyskinesia on a 0 to 4 scale in the extremities, trunk, and face, where 0 is no dyskinesia (better outcome) and 4 is severe dyskinesia (worse outcome). The total score range is 0 (better outcome) to 28 (worse outcome). Higher scores indicate a worse outcome.

The average abnormal involuntary movement scale was assessed using the modified intent-to-treat (MITT) population.

The mean concentration of study drug, SUN N4057, in participant blood plasma samples drawn during infusions.

Mean plasma concentrations were assessed using the pharmacokinetic (PK) population.

Cmax is the observed maximum concentration of SUN N4057 in the participant blood plasma sample after drug administration.

Cmax was assessed using the pharmacokinetic (PK) population.

Cmin is the observed minimum concentration of SUN N4057 in the participant blood plasma sample after drug administration. Average of C24 and C48 [ie, 24 hours after the initiation of infusion on Days 1 and 2. Cmin = average of (C24 and C48)](streamdown:incomplete-link)

Cmin was assessed using the pharmacokinetic (PK) population.

Caverage is the mean concentration of SUN N4057 in the participant blood plasma sample obtained from the observed concentrations during the 2-day drug infusions (average of C1, C6, C12, C25, C30, and C36 [ie, Hours 1, 6, 12, 25, 30, and 36 after the initiation of infusion on Day 1]). Caverage = average of (C1, C6, C12, C25, C30, and C36)

Caverage was assessed using the pharmacokinetic (PK) population.

AUCt is defined as the area under the drug concentration vs time curve from zero up to the last sampling point with a quantifiable drug concentration which is above the lower limit of quantification.

AUCt was assessed using the pharmacokinetic (PK) population.

A treatment-emergent adverse event (TEAE) was defined as an Adverse Event (AE) that was new in onset or aggravated in severity or frequency following administration of the investigational agent. This included any change from the screening physical examination findings or results of diagnostic procedures (eg, laboratory test, ECG) that were clinically significant, eg, required diagnostic or therapeutic intervention beyond confirmation alone.

Treatment-emergent adverse events (TEAEs) were assessed using the Safety population.