Study: NCT04217629

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.

Intervention type: DRUG
Group type: PLACEBO_COMPARATOR
Intervention: SY-005
Description: This single-dose group will be initiated in healthy subjects at a 0.75mg dose that is the maximum recommended starting dose(MRSD). Doses will be escalated in subsequent dosing process, after appropriate review of safety data. The subsequent planned doses are2.5mg, 5mg, 10mg, 15mg, 20mg successively. The dose of multiple-doses groups are depending on the results of single-dose groups.