| stigmastane | The parent substance of sitosterol. Synonym: sitostane. (05 Mar 2000) |
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| stigmasterol | <chemical> Chemical name: Stigmasta-5,22-dien-3-ol, (3beta,22E)- (12 Dec 1998) |
| malpighian stigmas | The points of entrance of the smaller veins into the larger veins of the spleen. (05 Mar 2000) |
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