@article{article459bfc97,
title   = {1,3-dimethylisoguanine, a new purine from the marine sponge amphymedon viridis},
author = {Chehade, C C and Dias, R. L. A. and Berlinck, Roberto Gomes de Souza and Ferreira, A G and Costa, L V and Rangel, M and Malpezzi, E L A and Freitas, J. C. and Hajdu, E},
year = {1997},
journal   = {Journal of Natural Products}
}