Experimental:CGX1321 alone and with pembrolizumab
Dose Escalation Phase: Ascending doses of CGX1321 once daily, orally, for 3 weeks (21 days) followed by a one-week (7-day) washout period in each 28-day cycle
Dose Expansion Phase: CGX1321, at the MTD (identified in the Dose Escalation Phase), once daily, orally, for 3 weeks (21 days) followed by a one-week (7-day) washout period in each 28-day cycle.
Roll-over Cohort: CGX1321 at a dose identified in Phase 1b, once daily, orally, for 2 weeks (14 days) followed by a one-week (7-day) washout period in combination with pembrolizumab administered IV once every three weeks (in each 21-day cycle).
Phase 1b: Ascending doses of CGX1321, once daily, orally, for 2 weeks (14 days) followed by a one-week (7-day) washout period in combination with pembrolizumab administered IV once every three weeks (in each 21-day cycle).
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