This study is a randomized, three period, six sequence, single dose crossover design with ABBV-CLS-7262 in healthy adult subjects.

On Day 1 of each period, subjects will receive a single oral dose of ABBV-CLS-7262 administered according to the food regimen assigned. There will be a 4-day washout period between doses. Food regimens include administration after fasting, following a high-fat/high-calorie meal, or with apple sauce. Upon completion each subject will have taken a total of three doses of ABBV-CLS-7262, with one dose administered with each food regimen.

Inclusion Criteria:

• Adult volunteers in general good health.
• Must voluntarily sign and date an informed consent, approved by an independent ethics committee (IEC)/institutional review board (IRB), prior to the initiation of any screening or study-specific procedures.
• Individuals between 18 and 55 years of age inclusive at the time of screening.
• Body Mass Index (BMI) is ≥ 18.0 to ≤ 32.0 kg/m2.
• All male subjects who are sexually active and not surgically sterilized must agree to use an acceptable contraceptive method. Additionally, male subjects must agree to not donate sperm during the study until 30 days after the final dose of study drug.
• All female subjects who are sexually active and of childbearing potential must agree to use a highly effective contraceptive method. Additionally, female subjects must agree to not donate eggs during the study and for 30 days after the final dose of study drug.

Exclusion Criteria:

• Subject who, in the opinion of the investigator, is incapable of completing study-required visits and procedures
• Pregnant or breastfeeding.
• Treatment with any other investigational treatment within 30 days