3-Oxo-6α,7α,15α,16α-tetrahydro-3′H,3″H-dicyclopropa-[6,7:15,16]-17α-pregn-4-en-21,17-carbolactone ;(1R,2R,4R,10R,11S,14S,15S,16S,18S,19S)-10,14-dimethylspiro[hexacyclo[9.8.0.02,4.05,10.014,19.016,18]nonadec-5-ene-15,5`-oxolane]-2`,7-dione; 6beta,7beta,15beta,16beta-Dimethylene-3-oxo-4-androstene-[17(beta-1`)-spiro-5`]perhydrofuran- 2`-one;