Herlt, A.J., L.N. Mander, W.A.R. Rombang, R.J. Rumampuk and S. Soemitro et al., 2004. Alkaloids from marine organisms: Part 8: Isolation of bisdemethylaaptamine and bisdemethylaaptamine-9-O-sulfat from an Indonesian Aaptos sp. marine sponge. Tetrahedron, 60: 6101-6104.

Herlt, J.H., L.N. Mander, E. Pongoh, R.J. Rumampuk and P. Tarigan, 2002. Two major saponins from seeds of Barringtonia asiatica: Putative antifeedants toward Epilachna sp. larvae. J. Nat. Prod., 65: 115-120.
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Pongoh, E.J., R.J. Rumampuk, P. Tarigan, A.J. Herlt and L.N. Mander, 2004. Isolation of an antifeedant saponin from the seed of Barringtonia asiatica. Indonesia. J. Chem., 4: 49-57.

Rombang, W.A.R., R.J. Rumampuk, P. Tarigan, A.J. Herlt and L.N. Mander, 2004. Chemical constituents of Indonesian marine sponges: Bisdemethylaaptamine, a naphtyridine alkaloid from Aaptos sp. Chem. Nat. Prod. Bull., 4: 23-26.

Rombang, W.A.R., R.J. Rumampuk, S. Soemitro and P. Tarigan, 2001. Alkaloids from marine sponge Aaptos. Proceeding of the National Seminar on Chemistry, Chemistry Department, 13 October 2001, Universitas Sebelas Maret, Surakarta. -.

Rombang, W.A.R., R.J. Rumampuk, E. Julaeha, S. Soemitro, P. Tarigan, A.J. Herlt and L.N. Mander, 2003. Three naphtyridine alkaloids from Bunaken marine park sponge Aaptos sp. Proceeding of the National Symposium on Natural Products Chemistry, Chemistry Department, 18-19th February 2003, Padjadjaran University, Bandung. -.

Rombang, W.A.R., R.J. Rumampuk, P. Tarigan, A.J. Herlt and L.N. Mander, 2002. Two bioactive alkaloids from the Bunaken sea garden sponge Aaptos sp. Proceedings of the International Seminar on Genetically Modified Plants, May 16-17, Universitas Negeri Manado-French Embassy. pp 73-76.

Rombang, W.A.R., R.J. Rumampuk, P. Tarigan, A.J. Herlt and L.N. Mander, 2004. Antioxidant potency of the Bunaken marine park sponge Aaptos sp. Proceedings of the International Symposium on Biomedicines. Biopharmaca Research Center-Bogor Agricultural University, 18-19th September 2003, Bogor, Indonesia, pp 230 233-.

Rumampuk, R.J. and P. Tarigan, 2006. Conversion of 16-dehydropregnenolone acetate into dehydroepiandrosterone through beckmann rearrangement. Sigma, 9: 1-7.
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Rumampuk, R.J. and P. dan Tarigan, 2003. Nuclear magnetic resonance as a tool in the structure elucidation of glycoside compounds (including Saponin). Proceeding of the National Symposium on Natural Products Chemistry, Chemistry Department, Padjadjaran University. Bandung, 18-19th February 2003, Bandung, Indonesian. -.

Rumampuk, R.J., E.J. Pongoh, P. Tarigan, A.J. Herlt and L.N. Mander, 2003. A triterpene ester saponin from the seed of Barringtonia asiatica. Indonesian J. Chem., 3: 149-155.

Rumampuk, R.J., E.J. Pongoh, P. Tarigan, A.J. Herlt and L.N. Mander, 2005. A1-Barrigenol, a pentahydroxyolean-12-ene from the seed of Indonesian Barringtonia asiatica. Chem. Nat. Prod. Bull., 5: 7-11.

Rumampuk, R.J., E.J. Pongoh, P. Tarigan, A.J. Herlt andL.N. Mander, 2004. An extensive high-field NMR study on triterpene sapogenin, Camelliagenin A from the seed of Barringtonia asiatica. Proceedings of the International Symposium on Biomedicines. Biopharmaca Research Center-Bogor Agricultural University, 18-19th September 2003, Bogor, Indonesia. pp 314-320.

Rumampuk, R.J., H.H. Bahti, S. Soemitro and P. Tarigan, 2001. Identification of carbohydrate moiety on saponin using gas chromatography. Proceeding of the National Seminar on Chemistry, Chemistry Department, 21st October 2001 State University of Yogyakarta. -.

Rumampuk, R.J., H.H. Bahti, S. Soemitro and P. Tarigan, 2001. Structure elucidation of saponin by spectroscopy. Proceeding of the the National Seminar on Chemistry, Chemistry Department, 13 October 2001. Universitas Sebelas Maret, Surakarta, pp 356-362.

Rumampuk, R.J., P. Tarigan, A.J. Herlt and L.N. Mander, 2001. Identification and sequencing by NMR spectroscopy of the carbohydrate moiety in a saponin from Barringtonia asiatica. Indonesian J. Chem., 1: 120-124.

Safitri, R., R. Yuliati and R.J. Rumampuk, 2003. Xanthin oxidase inhibition activity in vitro of two aromatic compounds from the heart bark of Secang (Caesalpinia sappan L). Chem. Rev., 6: 11-16.