"Novel compounds with metal-binding capability, extracted, isolated, and purified from cyanobacteria". Batucan, JD; Cao, EP; Salvador-Reyes, LA (2024). PH 1/2020/050321 B1. Intellectual Property Office of the Philippines.  https://onlineservices.ipophil.gov.ph/patgazette/IPASJournal/V27N61_INV_2nd.pdf