Ergost-4-en-3-one,1-(acetyloxy)-22,24,25-[ethylidynetris(oxy)]-7-hydroxy-, [1a,7a,22R(S)]-; 2,7,8-Trioxabicyclo[3.2.1]octane,ergost-4-en-3-one deriv.; Petuniasterone S
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