C18H18O5	F(000) = 664
Mr = 314.32	Dx = 1.389 Mg m−3
Monoclinic, P21/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 5893 reflections
a = 12.8502 (8) Å	θ = 2.3–28.2°
b = 8.3226 (5) Å	µ = 0.10 mm−1
c = 14.1865 (9) Å	T = 100 K
β = 97.765 (1)°	Irregular block, yellow
V = 1503.29 (16) Å3	0.45 × 0.40 × 0.05 mm
Z = 4