Cucurbitane Cucurbitane is a class of chemical compounds with formula . There are a polycyclic hydrocarbon , specifically triterpene . There are isomers of lanostane , from which it differs by the formal shift of a methyl group from the 10 to the 9β position in the standard steroid numbering scheme . The name is applied to two stereoisomers , distinguished by the prefixes 5α- and 5β- , which differ by the handedness of the bonds at a particular carbon atom .Derivatives Compounds with the basic cucurbitane skeleton are found in many plants, and some are important phytopharmaceuticals , Natural cucurbitane-related compounds include:Named Balsaminapentaol , from Momordica balsamina . Balsaminol A , from Momordica balsamina . Balsaminol B , from Momordica balsamina . Brydioside A from Bryonia dioica Bryoamaride and derivatives from Bryonia dioica Charantin or foetidin, from Momordica charantia and Momordica foetida Charantosides I-VIII , from Momordica charantia . Cucurbalsaminol B , from Momordica balsamina . Cucurbalsaminol A , from Momordica balsamina . Cucurbitacins A-L, O-T Datiscosides, from Datisca glomerata Endecaphyllacins A and B , from roots of Hemsleya endecaphylla Hemslecins A and B , from roots of H. endecaphylla Lepidolide , from the mushroom Russula lepida Karavilagenin E , from Momordica balsamina . Khekadaengosides A, B, D and K , from Trichosanthes tricuspidata Kuguacins A-S , from stems and leaves of Momordica charantia Kuguaglycosides A-H , from the root of Momordica charantia Mogrosides I-V , from the fruits of Siraitia grosvenorii Momordicin I, II and 28 , from Momordica charantia Momordicines II and IV , from leaves of Momordica charantia Momordicosides A-S , from Momordica charantia fruits Neokuguaglucoside , from Momordica charantia fruits Neomogroside , from the fruit of Siraitia grosvenorii . Pentanorcucurbitacins A and B Perseapicroside A , from Persea mexicana Scandenoside R9 , from Hemsleya panacis-scandens Spinosides A and B , from Desfontainia spinosa Unnamed 3β,7β,23ξ-trihydroxycucurbita-5,24-dien-19-al , soluble in chloroform, melts at 123−125 °C, from Momordica charantia , Momordica foetida . 3β,7β,25-trihydroxycucurbita-5,23-dien-19-al , soluble in chloroform, melts at 188−191 °C, from Momordica charantia , Momordica foetida 3β,7β-dihydroxy-25-methoxycucurbita-5,23-dien-19-al , soluble in chloroform, from Momordica charantia , Momordica foetida 5β,19-epoxy-25-methoxycucurbita-6,23-dien-3β,19-diol , soluble in chloroform, melts at 182−184 °C, from Momordica foetida 5β,19-epoxycucurbita-6,23-dien-3β,19,25-triol , soluble in chloroform, from Momordica foetida 5β,19-epoxy-19-methoxycucurbita-6,23-dien-3β,25-diol , soluble in chloroform, melts at 102−104 °C, from Momordica charantia , Momordica foetida 5β,19-epoxy-19,25-dimethoxycucurbita-6,23-dien-3β-ol , soluble in chloroform, from Momordica charantia , Momordica foetida 5β,19-epoxy-25-methoxycucurbita-6,23-dien-3β-ol , soluble in chloroform, melts at 139−141 °C, from Momordica charantia , Momordica foetida 19-n -butanoxy-5β,19-epoxycucurbita-6,23-diene-3β,25-diol 3-O -β-glucopyranoside,, white powder soluble in methanol , from Momordica charantia fruit 23-O -β-allopyranosylecucurbita-5,24-dien-7α,3β,22,23-tetraol 3-O -β-allopyranoside,, white powder soluble in methanol, from Momordica charantia fruit 23,24,25-trihydroxycucurbit-5-ene 3-O --25-O -β-glucopyranoside,, white powder soluble in methanol, from Momordica charantia fruit 2,16-dihydroxy-22,23,24,25,26,27-hexanorcucurbit-5-en-11,20-dione 2-O-β-D-glucopyranoside , soluble in ethanol, from Cucurbita pepo fruits 16-hydroxy-22,23,24,25,26,27-hexanorcucurbit-5-en-11,20-dione 3-O-α-L-rhamnopyranosyl--β-D-glucopyranoside, white powder, soluble in ethanol, from Cucurbita pepo fruits 7-methoxycucurbita-5,24-diene-3β,23-diol, from Momordica balsamina 25,26,27-trinorcucurbit-5-ene-3,7,23-trione, white powder, soluble in methanol, from stems of Momordica charantia
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