(+-)-6-Methoxy-2-oxo-1,1,4aβ,7-tetramethyl-1,2,3,4,4a,9,10,10aα-octahydro-phenanthren

(3α,4α,7α,8aβ)-4,7,8a-trimethyl-2,3,4,5,6,7,8,8a-octahydro-1H-3a,7-methanoazulene-9-one

1,3a,5a-三甲基八氢环戊[c]戊烯-4(5H)-酮