The molecule is alpha-Ergocryptine in which the isobutyl (2-methylpropyl) substituent is replaced by sec-butyl (1-methylpropyl). It is a natural ergot alkaloid. Note that ergocryptine discussed in the literature prior to 1967, when beta-ergocryptine was separated from alpha-ergocryptine, is now referred to as alpha-ergocryptine. It derives from a hydride of an ergotaman.
(6aR,9R)-N-[(1S,2S,4R,7S)-7-butan-2-yl-2-hydroxy-5,8-dioxo-4-propan-2-yl-3-oxa-6,9-diazatricyclo[7.3.0.02,6]dodecan-4-yl]-7-methyl-6,6a,8,9-tetrahydro-4H-indolo[4,3-fg]quinoline-9-carboxamide