This was a multicenter, open-label, randomized, crossover bioequivalence study to evaluate the pharmacokinetics and safety of BR2022 and BR2022-1 in Patients with deleterious or suspected deleterious germline BRCA-mutated advanced ovarian cancer.

This study will be conducted in two stages. Stage 1 enrolls patients who have been taking BR2022-1 as existing therapy, and results will be evaluated before deciding whether to proceed with the Stage 2 part of the study and enroll more patients.

Inclusion Criteria:

1. Females aged 19 -74 at the time of consent
2. Those who voluntarily signed the informed consent to participate in this study
3. Patients with deleterious or suspected deleterious germline or somatic BRCA-mutated advanced epithelial ovarian, fallopian tube, or primary peritoneal cancer who have been taking stable doses of olaparib for more than 3 months before screening.

Exclusion Criteria:

1. Those who have a history of severe hypersensitivity to drugs that include the ingredients of the investigational product or have a history of clinically significant hypersensitivity reactions
2. Those who have gastrointestinal disorders (e.g., gastroesophageal reflux disease, gastrospasm, gastritis, gastrointestinal ulcers, Crohn's disease, etc.) or have had surgeries (excluding appendectomy or hernia surgery) that may affect the absorption of the investigational products
3. Those who are pregnant, suspected of pregnancy, or nursing