Sigmodal

Sigmodal (Rectidon) is a barbiturate derivative. It has sedative, hypnotic and anticonvulsant properties, and was used in surgical anaesthesia in the 1950s, and frequently appeared in drug mixtures in the 60s.^[1][2]

Sigmodal

Legal status
Legal status	CA: Schedule IV
Identifiers
IUPAC name 5-(2-bromoprop-2-en-1-yl)-5-(1-methylbutyl)pyrimidine-2,4,6(1H,3H,5H)-trione
CAS Number	1216-40-6 Y
PubChem CID	14630
ChemSpider	13964 N
UNII	8N609W64JZ
CompTox Dashboard (EPA)	DTXSID90874338
ECHA InfoCard	100.013.575
Chemical and physical data
Formula	C12H17BrN2O3
Molar mass	317.183 g·mol−1
3D model (JSmol)	Interactive image
SMILES CCCC(C)C1(C(=O)NC(=O)NC1=O)CC(=C)Br
InChI InChI=1S/C12H17BrN2O3/c1-4-5-7(2)12(6-8(3)13)9(16)14-11(18)15-10(12)17/h7H,3-6H2,1-2H3,(H2,14,15,16,17,18) N Key:ZGVCLZRQOUEZHG-UHFFFAOYSA-N N
NY (what is this?)  (verify)

It was never widely used compared to better known barbiturates such as thiopental, and has now been replaced by newer drugs with a better safety profile.