This study is a single-centre, open-label, dose escalation , safety, tolerability and pharmacokinetics (PK) study in healthy male and female subjects. The study include a screening day and a 5-day dosing period. Subjects will be enrolled in sequential cohorts and each cohort will include 8 subjects. there will be 24 subjects total included in the study. The duration of the clinical part of the study will be approximately 2 months.

Subjects meeting the eligibility criteria at screening will remain in the clinic from the evening preceding the first day of dosing (Day - 1) of the investigational medical product (IMP) and check out from the clinic 24 hours after the first dose administration of the IMP (in the morning of Day 2). Dose administration of the IMP in the evening of Day 2 and morning and evening dose for Days 3 and 4 will be performed at home. The subjects will check-in again in the morning of Day 5 and receive the last dose administration of the IMP and stay in the clinic 12 hours post dose. All subjects within the same cohort will receive the same dose of the IMP.

There will be 3 cohorts (dose-levels) with 8 subjects in each cohort corresponding to 24 subjects in total. Within a cohort the subjects will be dosed in groups of 4. There will be 24 hours between the dosing of the groups and 15 minutes between the dosing of the subjects in a group.

There will be an interval of approximately at least 1-week interval between the cohorts to allow time for compilation and evaluation of data for the Internal Safety Review Committee meeting.

Subsequent cohorts will be administered increasing doses until either the maximum tolerated dose (MTD) or the study maximum dose (SMD) has been reached.

Inclusion Criteria:

• Written informed consent, healthy subjects aged 19-65 years

Exclusion Criteria:

• Significant concurrent disease or medical conditions that are deemed to interfere with the safety or pharmacokinetics of CRD007 conduct of the trial