2,2-di-tert-butyl-7-(4,4-dimethoxybutyl)-6,10a-dimethyl-4a,5,8a,9,9a,10a-hexahydro-4H-1,3,8,10-tetraoxa-2-sila-anthracene

2,2-di-tert-butyl-7-(4,4-dimethoxybutyl)-6,10a-dimethyl-octahydro-1,3,8,10-tetraoxa-2-sila-anthracen-6-ol