SENYAWA NON FENOLIK DARI EKSTRAK n-HEKSANA KULIT BATANG BAKAU MERAH (Rhizophora stylosa) NON PHENOLIC COMPOUND FROM n-HEXANE EXTRACT OF THE STEM BARK RED MANGROVE (Rhizophora stylosa) - KIRANAWATI, DIYAH (UNESA Journal of Chemistry, 1970)