CYTOCHALASIN A;7(S)-hydroxy-16(R)-methyl-10-phenyl-24-oxa[14]cytochalasa-6(12),13(E),21(E)-triene-1,20,23-trione;CYTOCHALASIN A FROM DRESCHSLERA DEMATIOIDEA;CYTOCHALASIN A FROM DRESCHSLERA DEMATIOIDEA, BIOCHEMIKA, >= 99.0% (TLC);2H-Oxacyclotetradecino2,