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Updated: Jun 30, 2025

Assessing the Putative Anticryptococcal Properties of Crude and Clarified Extracts from Mollusks
Published on: December 2, 2022
Okichromanone, a new antiviral chromanone from a marine-derived Microbispora
Marwa Elsbaey1,2, Takahiro Jomori3, Junichi Tanaka3
1Pharmacognosy Department, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt. marwaelsebay1611@mans.edu.eg.
Abstract:
Okichromanone (1), a new chromanone, was isolated from the culture extract of a sponge-derived actinomycete Microbispora, along with known 1-hydroxyphenazine (2). Compound 1 was elucidated to exist as a mixture of two isomeric structures (1a and 1b) at a ratio of nearly 3:2. Compounds 1 and 2 showed anti HSV-I activity with IC50 values 40 and 86 μM, respectively, and anti HSV-II activity with IC50 values 59 and 123 μM, respectively.
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