Crystal structure determination of roseotoxin Z. C23H43N3O10, monoclinic, P1211 (no. 4), a = 7.914(1) Å, b = 16.509(3) Å, c = 10.522(2) Å, β = 92.484(1)°, V = 1373.4 Å(3), Z = 2,, R-gt(F) = 0.025, wR-ref(F) = 0.028, T = 150 K.