Cucurbitane

Cucurbitane
Names
	IUPAC name 19-Nor-5ξ,9β,10α-lanostane
	Systematic IUPAC name (1R,3aS,3bR,5aΞ,9aR,9bS,11aR)-3a,6,6,9b,11a-Pentamethyl-1-[(2R)-6-methylheptan-2-yl]hexadecahydro-1H-cyclopenta[a]phenanthrene
Identifiers
CAS Number	65441-59-0 (5α/β) ;
3D model (JSmol)	(5α): Interactive image; (5β): Interactive image;
ChEBI	CHEBI:73245 ;
ChemSpider	25936933 (5α) ; 28639243 (5β) ;
PubChem CID	71306377;
UNII	VQU8QE865A ;
CompTox Dashboard (EPA)	DTXSID50745373 ;
	InChI InChI=1S/C30H54/c1-21(2)11-9-12-22(3)23-16-18-30(8)26-15-14-24-25(13-10-17-27(24,4)5)28(26,6)19-20-29(23,30)7/h21-26H,9-20H2,1-8H3/t22-,23-,24-,25-,26-,28+,29-,30+/m1/s1 Key: ZYZJWAJOTPNVPI-AUAIAXQGSA-N ; (5α): InChI=1/C30H54/c1-21(2)11-9-12-22(3)23-16-18-30(8)26-15-14-24-25(13-10-17-27(24,4)5)28(26,6)19-20-29(23,30)7/h21-26H,9-20H2,1-8H3/t22-,23-,24-,25-,26-,28+,29-,30+/m1/s1 Key: ZYZJWAJOTPNVPI-AUAIAXQGBW; (5β): InChI=1/C30H54/c1-21(2)11-9-12-22(3)23-16-18-30(8)26-15-14-24-25(13-10-17-27(24,4)5)28(26,6)19-20-29(23,30)7/h21-26H,9-20H2,1-8H3/t22-,23-,24+,25-,26-,28+,29-,30+/m1/s1 Key: ZYZJWAJOTPNVPI-QJMYWHNVBB; (5β): InChI=1S/C30H54/c1-21(2)11-9-12-22(3)23-16-18-30(8)26-15-14-24-25(13-10-17-27(24,4)5)28(26,6)19-20-29(23,30)7/h21-26H,9-20H2,1-8H3/t22-,23-,24+,25-,26-,28+,29-,30+/m1/s1 Key: ZYZJWAJOTPNVPI-QJMYWHNVSA-N;
	SMILES (5α): C[C@H](CCCC(C)C)[C@@]1([H])CC[C@@]2(C)[C@]3([H])CC[C@@]4([H])C(C)(C)CCC[C@@]4([H])[C@]3(C)CC[C@@]21C; (5β): C[C@H](CCCC(C)C)[C@@]1([H])CC[C@@]2(C)[C@]3([H])CC[C@]4([H])C(C)(C)CCC[C@@]4([H])[C@]3(C)CC[C@@]21C;
Properties
Chemical formula	C30H54
Molar mass	414.762 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cucurbitane is a tetracyclic chemical compound with formula C
₃₀H
₅₄. It is a polycyclic hydrocarbon, specifically triterpene. It is also an isomer of lanostane (specifically 19(10→9β)-abeolanostane), from which it differs by the formal shift of a methyl group (carbon number 19) 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 (number 5 in the standard steroid numbering scheme).

5α-Cucurbitane
5β-Cucurbitane

Cucurbitane is the core chemical structure of a class of derivatives known as cucurbitane-type triterpenoids or simply as cucurbitanes.