17b(H),21a(H)-29-Normoretane;17b(H),21a(H)-Normoretane;17b(H)-Normoretane;17b,21aH-30-Norhopane;17bH,21aH-30-Norhopane;30-Nor-A'-neo-21aH-gammacerane;30-Normoretane;
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