Chemical constituents of Hoya paziae Kloppenb

- Perez, Judy D. V., Borlagdan, Melissa S., Aurigue, Fernando B., van Altena, Ian A., Ragasa, Consolacion Y.

Triterpenes from Pittosporum resiniferum hemsl

- Alimboyoguen, Agnes B., Cruz-De Castro, Kathlia A., Van Altena, Ian A., Ragasa, Consolacion Y.

Secondary metabolites from Dracontomelon dao (Merr. & Rolfe)

- Ragasa, Consolacion Y., Vivar, Julius Leonard A., De Los Reyes, Mariquit M., van Altena, Ian A.

Chemical constituents of Melanolepis multiglandulosa (Reinw. Ex blume)

- Apostol, Phelan G., De Los Reyes, Mariquit M., Van Altena, Ian A., Ragasa, Consolacion Y.

Triterpenes from Hoya paziae Kloppenb

- Borlagdan, Melissa, Aurigue, Fernando B., Van Altena, Ian A., Ragasa, Consolacion Y.

Chemical constituents of Alstonia scholaris (L.) R. Br

- Ragasa, Consolacion Y., Batarra, Tyson C., Tan, Maria Carmen S., van Altena, Ian A.

Chemical constituents of phellinus gilvus (Schwein.) Pat.

- Ragasa, Consolacion Y., Tan, Maria Carmen S., De Castro, Ma. Ellenita G., van Altena, Ian A.

Sterols from Trametes versicolor

- Borlagdan, Melissa S., De Castro, Ma Ellenita G., van Altena, Ian A., Ragasa, Consolacion Y.

Isolation and structure elucidation of 9-hydroxy-10E, 12Z-octadecadienoic acid from Dioscorea luzonensis

- Ragasa, Consolacion Y., Guardamano, Julian D., Tan, Maria Carmen S., Ulep, Roque A., van Altena, Ian A.

Chemical constituents of Ficus septica Burm. F.

- Ragasa, Consolacion Y., Macuha, Maria Roxanne, De Los Reyes, Mariquit M., Mandia, Emelina H., Van Altena, Ian A.