类固醇是一种具有生物活性的有机化合物，有四个环排列在特定的分子结构中。甾体具有两种主要的生物学功能:作为改变膜流动性的细胞膜的重要组成部分;作为信号分子。所有的类固醇都是从甾醇、羊毛甾醇(opisthokonts)或环芳烃醇(植物)的细胞中制造出来的。
2-((6S,8S,9S,10R,11S,13S,14S,17R)-11,17-Dihydroxy-6,10,13-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate
(2S,5S,5aR,7aS,7bR,9aR,11S,13aR,13bR,15bS)-11-Hydroxy-2,5a,7a,7b,10,10,13a-heptamethyl-1,5,5a,6,7,7a,7b,8,9,9a,10,11,12,13,13a,13b,14,15b-octadecahydro-2,5-methanochryseno[2,1-c]oxepin-3(2H)-one
(6aR,6bS,8aS,8bS,9aR,10aS,10bR)-8b-Acetyl-6a,8a-dimethyl-5,6,6a,6b,7,8,8a,8b,9a,10,10a,10b-dodecahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4(2H)-one
(2'R,4S,5'R,6aR,6bS,8aS,8bR,9S,11aS,12aS,12bS)-5',6a,8a,9-Tetramethyl-1,3,3',4,4',5,5',6,6a,6b,6',7,8,8a,8b,9,11a,12,12a,12b-icosahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran]-4-ol
(8R,9S,10R,13S,14S,17R)-17-Acetyl-17-hydroxy-10,13-dimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one
(1R,3S,5R,7R,8E,12R,14E,16E,18E,20E,22R,24S,25R,26S)-22-(((2R,3S,4S,5S,6R)-4-Amino-3,5-dihydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-1,3,26-trihydroxy-12-methyl-10-oxo-6,11,28-trioxatricyclo[22.3.1.05,7]octacosa-8,14,16,18,20-pentaene-25-carboxylic acid
(3S,4aR,6aR,6bS,8aR,11R,12S,12aR,14aR,14bR)-4,4,6a,6b,8a,11,12,14b-Octamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,14,14a,14b-icosahydropicen-3-ol
(R)-4-((3R,5S,6R,7R,8S,9S,10S,13R,14S,17R)-6-ethyl-3,7-dihydroxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoic acid
(8R,9S,13S,14S,17S)-2-Methoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
