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Two new pentacyclic sesterpenes, 12-O-desacetylfuroscalarol (1) and 12-O-desacetylscalarin (2), which enhance nerve growth factor synthesis, have been isolated from the Okinawan marine sponge Hyrtios sp. and their structures elucidated on the basis of spectroscopic data.
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Y et al. (1993) studied this question.
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