2H-Pyran-2-one, 6-(6-(5-ethylhexahydro-3,4-dihydroxy-3a,4-dimethylfuro(2,3-b)furan-2-yl)-1,3,5-hexatrienyl)-4-methoxy-5-methyl-, (2S-(2alpha(1E,3E,5E),3alpha,3abeta,4beta,5beta,6abeta))-, compd. with methanol (1:1)-