Use these databases to find peer reviewed journal articles:
Evaluating sources (CRAAP Test)
Reading scholarly journal articles
Selected Kapiʻolani CC books and eBooks which may be helpful in isolating active ingredients:
The Organic Chem Lab Survival Manual
Laboratory Manual of Organic Chemistry
Medicinal Plants: Chemistry and Properties
Bioactive Medicinal Plants
Plant Bioactives and Drug Discovery
Update on Undertaking Extractable and Leachable Testing
Chemical Analysis of Antibiotic Residues in Food
Medicinal Plant BiotechnologySelected Kapiʻolani CC books which may be helpful in researching uses of plants in Hawaiian culture:
La'au Hawaii: traditional Hawaiian uses of plants
Kāhuna lāʻau lapaʻau: Hawaiian Herbal Medicine
Plants in Hawaiian Medicine by 
Native Plants Used as Medicine in Hawaii
Native Hawaiian medicine
Medicine at Your Feet
Book of medical practices and Hawaiian prescriptions
Polynesian Herbal Medicine
Folk Remedies from Hawaiʻi by Ethnobotany of the Hawaiians
Ethnobotany of Hawaii by 
Kahua Kukui: Ethnobotany of the Hawaiians by 
Plants in Hawaiian Culture by 
Plants of Old Hawaiʻi by 
Hawaiian Heritage Plants
Native Planters in Old Hawaii: Their Life, Lore, and Environment by 
Plants of the Canoe People
Hawaii's Native Plants
Growing Native Hawaiian Plants
Growing Native Hawaiian Plants
A Native Hawaiian Garden by 
Traditional Trees of Pacific Islands
Trees of HawaiiHawaiian ʻawa : views of an ethnobotanical treasure
Noni
A Tropical Garden Flora
Ancient Hawaiian Civilization: A Series of Lectures Delivered at the Kamehameha SchoolsAncient Hawaiian life
Nānā I Ke Kumu by 