title: Antifungal activity evaluation of the constituents of Haliclona baeri and Haliclona cymaeformis, collected from the Gulf of Thailand.
abstract: A new compound maleimide-5-oxime was isolated, together with 3,4-dihydroxybenzoic acid, tetillapyrone, from the ethyl acetate extract of the marine sponge Haliclona baeri while tetillapyrone, nortetillapyrone, p-hydroxybenzaldehyde and phenylacetic acid were isolated from the ethyl acetate extract of Haliclona cymaeformis, collected from the Gulf of Thailand. The structures of tetillapyrone and nortetillapyrone were re-examined using HMBC correlations. Maleimide-5-oxime, tetillapyrone and nortetillapyrone were found to be inactive against three human tumor cell lines (the estrogen-dependent ER(+) MCF-7, the estrogen-independent ER(-) MDA-MB-231 and NCI-H460. Maleimide-5-oxime, p-hydroxybenzaldehyde, phenylacetic acid, tetillapyrone and nortetillapyrone were evaluated for their growth inhibitory effect against seven yeasts and eight filamentous fungi. Only nortetillapyrone showed antifungal activity, with a preponderance on the dermatophytic filamentous fungi.
authors.affiliation: Bangsaen Institute of Marine Science (BIMS), Burapha University, Bangsaen, Chonburi 20131, Thailand.
authors.forename: Rawiwan
authors.initials: R
authors.lastname: Wattanadilok
authors.forename: Pichan
authors.initials: P
authors.lastname: Sawangwong
authors.forename: Cátia
authors.initials: C
authors.lastname: Rodrigues
authors.forename: Honorina
authors.initials: H
authors.lastname: Cidade
authors.forename: Madalena
authors.initials: M
authors.lastname: Pinto
authors.forename: Eugenia
authors.initials: E
authors.lastname: Pinto
authors.forename: Artur
authors.initials: A
authors.lastname: Silva
authors.forename: Anake
authors.initials: A
authors.lastname: Kijjoa